2004 · Shift 0

190 questions · JEE Main

Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.

PYQ Library
JEE Main
Papers
2004 · Shift 0

2004 · Shift 0

190 questions · JEE Main

Chemistry66 questions Mathematics50 questions Physics74 questions

Q1.An ideal gas expands in volume from 1 $\times$ 10-3 m3 to 1 $\times$ 10-2 m3 at 300 K against a constant pressure of 1 $\times$ 105 Nm-2. The work done is :
Chemistry · Thermodynamics · MCQ
Q2.The enthalpies of combustion of carbon and carbon monoxide are -393.5 and -283 kJ mol-1 respectively. The enthalpy of formation of carbon monoxide per mole is :
Chemistry · Thermodynamics · MCQ
Q3.The conjugate base of $H_{2} P O_{4}^{-}$ is :
Chemistry · Ionic Equilibrium · MCQ
Q4.What is the equilibrium expression for the reaction $P_{4}$ (s) + 5 $O_{2}$ $⇋$ $P_{4} O_{10}$ (s)?
Chemistry · Chemical Equilibrium · MCQ
Q5.For the reaction, $C O$ (g) + $C l_{2}$ (g) $⇋$ $C O C l_{2}$ (g) the $\frac{K _{p}}{K _{c}}$ is equal to :
Chemistry · Chemical Equilibrium · MCQ
Q6.The equilibrium constant for the reaction $N_{2}$ (g) + $O_{2}$ (g) $⇋$ 2 $N O$ (g) at temperature T is 4 $\times$ 10-4. The value of Kc for the reaction $N O$ (g) $⇋$ $\frac{1}{2}$ $N_{2}$ (g) + $\frac{1}{2}$ $O_{2}$ …
Chemistry · Chemical Equilibrium · MCQ
Q7.The molar solubility (in ol L-1) of a sparingly soluble salt $M X_{4}$ is "s". The corresponding solubility product is Ksp. 's' is given in term of Ksp by the relation :
Chemistry · Ionic Equilibrium · MCQ
Q8.Which one of the following has the minimum boiling point?
Chemistry · Hydrocarbons · MCQ
Q9.Which one the following does not have sp2 hybridized carbon?
Chemistry · Basics of Organic Chemistry · MCQ
Q10.Which of the following compound is not chiral?
Chemistry · Basics of Organic Chemistry · MCQ
Q11.Consider the acidity of the carboxylic acids: (a) $P h C O O H$ (b) o – $N O_{2} C_{6} H_{4} C O O H$ (c) p – $N O_{2} C_{6} H_{4} C O O H$ (d) m – $N O_{2} C_{6} H_{4} C O O H$ Which of the following order is correct?
Chemistry · Basics of Organic Chemistry · MCQ
Q12.Which of the following will have meso-isomer also?
Chemistry · Basics of Organic Chemistry · MCQ
Q13.Among the properties (a) reducing (b) oxidising (c) complexing, the set of properties shown by CN– ion towards metal species is :
Chemistry · Coordination Compounds · MCQ
Q14.The compound formed on heating chlorobenzene with chloral in the presence concentrated sulphuric acid is
Chemistry · Haloalkanes and Haloarenes · MCQ
Q15.On mixing ethyl acetate with aqueous sodium chloride, the composition of the resultant solution is
Chemistry · Aldehydes Ketones and Carboxylic Acids · MCQ
Q16.Which of the following undergoes reaction with 50% sodium hydroxide solution to give the corresponding alcohol and acid?
Chemistry · Aldehydes Ketones and Carboxylic Acids · MCQ
Q17.Which one of the following reduced with zinc and hydrochloric acid to give the corresponding hydrocarbon?
Chemistry · Aldehydes Ketones and Carboxylic Acids · MCQ
Q18.Acetyl bromide reacts with excess of $C H_{3} M g I$ followed by treatment with a saturated solution of $N H_{4} C l$ given
Chemistry · Alcohols Phenols and Ethers · MCQ
Q19.Which base is present in RNA but not in DNA?
Chemistry · Biomolecules · MCQ
Q20.Insulin production and its action in human body are responsible for the level of diabetes. This compound belongs to which of the following categories?
Chemistry · Biomolecules · MCQ
Q21.The compound formed in the positive test for nitrogen with the Lassaigne solution of an organic compound is
Chemistry · Practical Organic Chemistry · MCQ
Q22.The correct order of magnetic moments (spin only values in B.M.) among is : (Atomic numbers: Mn = 25; Fe = 26, Co =27)
Chemistry · Coordination Compounds · MCQ
Q23.Which of the following is the strongest base ?
Chemistry · Basics of Organic Chemistry · MCQ
Q24.Amongst the following compounds, the optically active alkane having lowest molecular mass is
Chemistry · Basics of Organic Chemistry · MCQ
Q25.Rate of the reaction is fastest when $Z$ is Includes diagram
Chemistry · Basics of Organic Chemistry · MCQ
Q26.The $I U P A C$ name of the compound is Includes diagram
Chemistry · Basics of Organic Chemistry · MCQ
Q27.Among the following compounds which can be dehydrated very easily is
Chemistry · Alcohols Phenols and Ethers · MCQ
Q28.Of the following outer electronic configurations of atoms, the highest oxidation state is achieved by which one of them?
Chemistry · D and F Block Elements · MCQ
Q29.Consider the following nuclear reactions $_{92}^{238} M \to_{Y}^{X} N + 2_{2}^{4} H e_{Y}^{X} N \to_{B}^{A} L + 2 β^{+}$ The number of neutrons in the element L is
Chemistry · Chemical Kinetics and Nuclear Chemistry · MCQ
Q30.Identify the correct statements regarding enzymes
Chemistry · Biomolecules · MCQ
Q31.For which of the following parameters the structural isomers $C_{2} H_{5} O H$ and $C H_{3} O C H_{3}$ would be expected to have the same values? (Assume ideal behaviour)
Chemistry · Solutions · MCQ
Q32.Which of the following liquid pairs shows a positive deviation from Raoult’s law?
Chemistry · Solutions · MCQ
Q33.Which one of the following aqueous solutions will exhibit highest boiling point?
Chemistry · Solutions · MCQ
Q34.Which one of the following statements is false?
Chemistry · Solutions · MCQ
Q35.In a hydrogen – oxygen fuel cell, combustion of hydrogen occurs to :
Chemistry · Electrochemistry · MCQ
Q36.Consider the following Eo values $E_{F e^{3 +} / F e^{2 +}}^{o}$ = 0.77 V; $E_{S n^{2 +} / S n}^{o}$ = -0.14 V Under standard conditions the potential for the reaction $S n$ (s) + 2 $F e^{3 +}$ (aq) $\to$ 2 $F e^{2 +}$ (aq) + $S n^{2 +}$ (aq) is :
Chemistry · Electrochemistry · MCQ
Q37.The standard e.m.f of a cell, involving one electron change is found to be 0.591 V at 25oC. The equilibrium constant of the reaction is (F = 96,500 C mol-1: R = 8.314 JK-1 mol-1)
Chemistry · Electrochemistry · MCQ
Q38.The limiting molar conductivities Λ° for NaCl, KBr and KCl are 126, 152 and 150 S cm2 mol-1 respectively. The Λ° for NaBr is
Chemistry · Electrochemistry · MCQ
Q39.In a cell that utilises the reaction $Z n$ (s) + 2 $H^{+}$ (aq) $\to$ $Z n^{2 +}$ (aq) + $H_{2}$ (g) addition of $H_{2} S O_{4}$ to cathode compartment, will
Chemistry · Electrochemistry · MCQ
Q40.The $E_{M^{3 +} / M^{2 +}}^{o}$ values for Cr, Mn, Fe and Co are – 0.41, +1.57, + 0.77 and +1.97 V respectively. For which one of these metals the change in oxidation state form +2 to +3 is easiest?
Chemistry · Electrochemistry · MCQ
Q41.In a first order reaction, the concentration of the reactant decreases from 0.8 M to 0.4 M in 15 minutes. The time taken for the concentration to change from 0.1 M to 0.025 M is
Chemistry · Chemical Kinetics and Nuclear Chemistry · MCQ
Q42.The rate equation for the reaction 2A + B $\to$ C is found to be: rate k[A][B]. The correct statement in relation to this reaction is that the
Chemistry · Chemical Kinetics and Nuclear Chemistry · MCQ
Q43.The half – life of a radioisotope is four hours. If the initial mass of the isotope was 200 g, the mass remaining after 24 hours undecayed is
Chemistry · Chemical Kinetics and Nuclear Chemistry · MCQ
Q44.Beryllium and aluminium exhibit many properties which are similar. But the two elements differ in :
Chemistry · P Block Elements · MCQ
Q45.Which one the following statement regarding helium is incorrect?
Chemistry · P Block Elements · MCQ
Q46.Excess of $K I$ reacts with $C u S O_{4}$ solution and then $N a_{2} S_{2} O_{3}$ solution is added to it. Which of the statements is incorrect for this reaction?
Chemistry · D and F Block Elements · MCQ
Q47.Cerium (Z = 58) is an important member of the lanthanoids. Which of the following statements about cerium is incorrect?
Chemistry · D and F Block Elements · MCQ
Q48.Which one of the following complexes in an outer orbital complex?
Chemistry · Coordination Compounds · MCQ
Q49.Coordination compound have great importance in biological systems. In this context which of the following statements is incorrect?
Chemistry · Coordination Compounds · MCQ
Q50.Which one the following has largest number of isomers? (R = alkyl group, en = ethylenediamine)
Chemistry · Coordination Compounds · MCQ
Q51.The coordination number of central metal atom in a complex is determined by :
Chemistry · Coordination Compounds · MCQ
Q52.6.02 $\times$ 1020 molecules of urea are present in 100 ml of its solution. The concentration of urea solution is (Avogadro constant, NA = 6.02 $\times$ 1023 mol-1)
Chemistry · Some Basic Concepts of Chemistry · MCQ
Q53.To neutralise completely 20 mL of 0.1 M aqueous solution of phosphorous acid ( $H_{3} P O_{3}$ ), the volume of 0.1 M aqueous $K O H$ solution required is
Chemistry · Some Basic Concepts of Chemistry · MCQ
Q54.The ammonia evolved from the treatment of 0.30 g of an organic compound for the estimation of nitrogen was passed in 100 mL of 0.1 M sulphuric acid. The excess of acid required 20 mL of 0.5 M sodium hydroxide solution for complete…
Chemistry · Some Basic Concepts of Chemistry · MCQ
Q55.Which of the following sets of quantum numbers is correct for an electron in 4f orbital?
Chemistry · Structure of Atom · MCQ
Q56.Consider the ground state of Cr atom (Z = 24). The number of electrons with the azimuthal quantum numbers, l = 1 and 2 are respectively
Chemistry · Structure of Atom · MCQ
Q57.The wavelength of the radiation emitted when in a hydrogen atom electron falls from infinity to stationary state 1, would be (Rydberg constant = 1.097 $\times$ 107 m-1)
Chemistry · Structure of Atom · MCQ
Q58.Which one of the following sets of ions represents the collection of isoelectronic species? (Atomic nos. : F = 9, Cl = 17, Na = 11, Mg = 12, Al = 13, K = 19, Ca = 20, Sc = 21)
Chemistry · Structure of Atom · MCQ
Q59.Which one of the following ions has the highest value of ionic radius?
Chemistry · Periodic Table and Periodicity · MCQ
Q60.Among $A l_{2} O_{3}$ , $S i O_{2}$ , $P_{2} O_{3}$ and $S O_{2}$ the correct order of acid strength is
Chemistry · Periodic Table and Periodicity · MCQ
Q61.The formation of the oxide ion $O^{2 -}$ (g) requires first an exothermic and then an endothermic step as shown below $O$ (g) + $e^{-}$ = $O_{(g)}^{-} Δ$ Ho = -142 kJmol-1 $O_{(g)}^{-}$ + $e^{-}$ = $O_{(g)}^{2 -} Δ$ Ho = 844 kJmol-1 This…
Chemistry · Periodic Table and Periodicity · MCQ
Q62.The correct order of bond angles (smallest first) in $H_{2} S$ , $N H_{3}$ , $B F_{3}$ and $S i H_{4}$ is
Chemistry · Chemical Bonding and Molecular Structure · MCQ
Q63.The bond order in $N O$ is 2.5 while that in $N O^{+}$ is 3. Which of the following statements is true for these two species?
Chemistry · Chemical Bonding and Molecular Structure · MCQ
Q64.The states of hybridization of boron and oxygen atoms in boric acid ( $H_{3} B O_{3}$ ) are respectively
Chemistry · Chemical Bonding and Molecular Structure · MCQ
Q65.Which one of the following has the regular tetrahedral structure? (Atomic nos : B = 5, S = 16, Ni = 28, Xe = 54)
Chemistry · Chemical Bonding and Molecular Structure · MCQ
Q66.The maximum number of 90° angles between bond pair of electrons is observed in
Chemistry · Chemical Bonding and Molecular Structure · MCQ
Q67.The graph of the function y = f(x) is symmetrical about the line x = 2, then
Mathematics · Functions · MCQ
Q68.The range of the function f(x) = $^{7 - x} P_{x - 3}$ is
Mathematics · Functions · MCQ
Q69.If $f : R \to S$ , defined by $f (x) = sin x - 3 cos x + 1$ , is onto, then the interval of $S$ is
Mathematics · Functions · MCQ
Q70.The domain of the function $f (x) = \frac{s i n ^{- 1} ( x - 3 )}{9 - x ^{2}}$
Mathematics · Functions · MCQ
Q71.Let $f (x) = \frac{1 - t a n x}{4 x - π}$ , $x e \frac{π}{4}$ , $x \in [0, \frac{π}{2}]$ . If $f (x)$ is continuous in $[0, \frac{π}{2}]$ , then $f (\frac{π}{4})$ is
Mathematics · Limits Continuity and Differentiability · MCQ
Q72.If $x \to \infty lim (1 + \frac{a}{x} + \frac{b}{x ^{2}})^{2 x} = e^{2}$ , then the value of $a$ and $b$ , are
Mathematics · Limits Continuity and Differentiability · MCQ
Q73.Consider the following statements: (a) Mode can be computed from histogram (b) Median is not independent of change of scale (c) Variance is independent of change of origin and scale. Which of these is/are correct?
Mathematics · Statistics · MCQ
Q74.In a series of 2n observations, half of them equal $a$ and remaining half equal $- a$ . If the standard deviation of the observations is 2, then $∣ a ∣$ equals
Mathematics · Statistics · MCQ
Q75.If $u = a^{2} cos^{2} θ + b^{2} sin^{2} θ + a^{2} sin^{2} θ + b^{2} cos^{2} θ$ then the difference between the maximum and minimum values of $u^{2}$ is given by :
Mathematics · Trigonometric Ratio and Identites · MCQ
Q76.The value of $I = 0 \int π /2 \frac{( s i n x + c o s x ) ^{2}}{1 + s i n 2 x} d x$ is
Mathematics · Definite Integration · MCQ
Q77.If $x = e^{y + e^{y} + e^{y + .....\infty}}$ , $x > 0,$ then $\frac{d y}{d x}$ is
Mathematics · Differentiation · MCQ
Q78.A point on the parabola $y^{2} = 18 x$ at which the ordinate increases at twice the rate of the abscissa is
Mathematics · Application of Derivatives · MCQ
Q79.Let $A = 121 - 1 11 1 - 3 1 .$ and $10$ $B = 4 - 5 1 20 - 2 2 α 3$ …
Mathematics · Matrices and Determinants · MCQ
Q80.Let $A = 00 - 1 0 - 1 0 - 1 00$ . The only correct statement about the matrix $A$ is
Mathematics · Matrices and Determinants · MCQ
Q81.If $a_{1}, a_{2}, a_{3}, ........., a_{n}, ......$ are in G.P., then the value of the determinant $lo g a_{n} lo g a_{n + 3} lo g a_{n + 6} lo g a_{n + 1} lo g a_{n + 4} lo g a_{n + 7} lo g a_{n + 2} lo g a_{n + 5} lo g a_{n + 8},$ …
Mathematics · Matrices and Determinants · MCQ
Q82.If $\int \frac{s i n x}{s i n ( x - α )} d x = A x + B lo g sin (x - α), + C,$ then value of $(A, B)$ is
Mathematics · Indefinite Integrals · MCQ
Q83. $\int \frac{d x}{c o s x - s i n x}$ is equal to
Mathematics · Indefinite Integrals · MCQ
Q84.The eccentricity of an ellipse, with its centre at the origin, is $\frac{1}{2}$ . If one of the directrices is $x = 4$ , then the equation of the ellipse is :
Mathematics · Ellipse · MCQ
Q85.The value of $- 2 \int 3 1 - x^{2} d x$ is
Mathematics · Definite Integration · MCQ
Q86.If $0 \int π x f (sin x) d x = A 0 \int π /2 f (sin x) d x,$ then $A$ is
Mathematics · Definite Integration · MCQ
Q87.If $f (x) = \frac{e ^{x}}{1 + e ^{x}}, I_{1} = f (- a) \int f (a) xg {x (1 - x)} d x$ and $I_{2} = f (- a) \int f (a) g {x (1 - x)} d x,$ …
Mathematics · Definite Integration · MCQ
Q88.The area of the region bounded by the curves $y = ∣ x - 2 ∣, x = 1, x = 3$ and the $x$ -axis is :
Mathematics · Area Under the Curves · MCQ
Q89.Solution of the differential equation $y d x + (x + x^{2} y) d y = 0$ is
Mathematics · Differential Equations · MCQ
Q90.The probability that $A$ speaks truth is $\frac{4}{5},$ while the probability for $B$ is $\frac{3}{4} .$ The probability that they contradict each other when asked to speak on a fact is :
Mathematics · Probability · MCQ
Q91.A particle acted on by constant forces $4 i + j - 3 k$ and $3 i + j - k$ is displaced from the point $i + 2 j + 3 k$ to the point $5 i + 4 j + k .$ …
Mathematics · Vector Algebra · MCQ
Q92.Let $u, v, w$ be such that $u = 1, v 2, w 3.$ If the projection $v$ …
Mathematics · Vector Algebra · MCQ
Q93.A line with direction cosines proportional to $2, 1, 2$ meets each of the lines $x = y + a = z$ and $x + a = 2 y = 2 z$ . The co-ordinates of each of the points of intersection are given by :
Mathematics · 3D Geometry · MCQ
Q94.Let $T_{r}$ be the rth term of an A.P. whose first term is a and common difference is d. If for some positive integers m, n, $m e n, T_{m} = \frac{1}{n} an d T_{n} = \frac{1}{m},$ then a - d equals
Mathematics · Sequences and Series · MCQ
Q95.Let $α, β$ be such that $π < α - β < 3 π$ . If $s in α + sin β = - \frac{21}{65}$ and $cos α + cos β = - \frac{27}{65}$ then the value of $\cos {{\alpha - \beta } \over…
Mathematics · Trigonometric Ratio and Identites · MCQ
Q96.A line makes the same angle $θ$ , with each of the $x$ and $z$ axis. If the angle $β$ , which it makes with y-axis, is such that $sin^{2} β = 3 sin^{2} θ,$ then $cos^{2} θ$ equals :
Mathematics · 3D Geometry · MCQ
Q97.Let z and w be complex numbers such that $\overline{z} + i \overline{w} = 0$ and arg zw = $π$ . Then arg z equals :
Mathematics · Complex Numbers · MCQ
Q98.If $z = x - i y$ and $z^{\frac{1}{3}} = p + i q$ , then $\frac{( \frac{x}{p} + \frac{y}{q} )}{( p ^{2} + q ^{2} )}$ is equal to :
Mathematics · Complex Numbers · MCQ
Q99.If $z^{2} - 1 = ∣ z ∣^{2} + 1$ , then z lies on :
Mathematics · Complex Numbers · MCQ
Q100.Let two numbers have arithmetic mean 9 and geometric mean 4. Then these numbers are the roots of the quadratic equation
Mathematics · Quadratic Equation and Inequalities · MCQ
Q101.If $(1 - p)$ is a root of quadratic equation $x^{2} + p x + (1 - p) = 0$ then its root are
Mathematics · Quadratic Equation and Inequalities · MCQ
Q102.If one root of the equation $x^{2} + p x + 12 = 0$ is 4, while the equation $x^{2} + p x + q = 0$ has equal roots, then the value of $^{'} q^{'}$ is
Mathematics · Quadratic Equation and Inequalities · MCQ
Q103.How many ways are there to arrange the letters in the word GARDEN with vowels in alphabetical order
Mathematics · Permutations and Combinations · MCQ
Q104.The coefficient of the middle term in the binomial expansion in powers of $x$ of $(1 + α x)^{4}$ and $(1 - α x)^{6}$ is the same if $α$ equals
Mathematics · Binomial Theorem · MCQ
Q105.The number of ways of distributing 8 identical balls in 3 distinct boxes so that none of the boxes is empty is
Mathematics · Permutations and Combinations · MCQ
Q106.The coefficient of $x^{n}$ in expansion of $(1 + x) (1 - x)^{n}$ is
Mathematics · Binomial Theorem · MCQ
Q107.The equation of the straight line passing through the point $(4, 3)$ and making intercepts on the co-ordinate axes whose sum is $- 1$ is :
Mathematics · Straight Lines and Pair of Straight Lines · MCQ
Q108.Let $A (2, - 3)$ and $B (- 2, 1)$ be vertices of a triangle $A B C$ . If the centroid of this triangle moves on the line $2 x + 3 y = 1$ , then the locus of the vertex $C$ is the line :
Mathematics · Straight Lines and Pair of Straight Lines · MCQ
Q109.If the lines 2x + 3y + 1 + 0 and 3x - y - 4 = 0 lie along diameter of a circle of circumference $10 π$ , then the equation of the circle is :
Mathematics · Circle · MCQ
Q110.If a circle passes through the point (a, b) and cuts the circle $x^{2} + y^{2} = 4$ orthogonally, then the locus of its centre is :
Mathematics · Circle · MCQ
Q111.Intercept on the line y = x by the circle $x^{2} + y^{2} - 2 x = 0$ is AB. Equation of the circle on AB as a diameter is :
Mathematics · Circle · MCQ
Q112.If $a e 0$ and the line $2 b x + 3 cy + 4 d = 0$ passes through the points of intersection of the parabolas $y^{2} = 4 a x$ and $x^{2} = 4 a y$ , then :
Mathematics · Parabola · MCQ
Q113.Let $a, b$ and $c$ be non-zero vectors such that $(a \times b) \times c = \frac{1}{3} b c a .$ …
Mathematics · Vector Algebra · MCQ
Q114.If the straight lines $x = 1 + s, y = - 3 - λ s, z = 1 + λ s$ and $x = \frac{t}{2}, y = 1 + t, z = 2 - t,$ with parameters $s$ and $t$ respectively, are co-planar, then $λ$ equals :
Mathematics · 3D Geometry · MCQ
Q115.Let $a, b$ and $c$ be three non-zero vectors such that no two of these are collinear. If the vector $a + 2 b$ is collinear with $c$ and $b + 3 c$ …
Mathematics · Vector Algebra · MCQ
Q116.Let $R = {(1, 3), (4, 2), (2, 4), (2, 3), (3, 1)}$ be a relation on the set $A = {1, 2, 3, 4}$ . The relation $R$ is :
Mathematics · Sets and Relations · MCQ
Q117.The manifestation of band structure in solids is due to
Physics · Electronic Devices · MCQ
Q118.An electromagnetic wave of frequency $v = 3.0 M H z$ passes from vacuum into a dielectric medium with permittivity $\in= 4.0.$ Then
Physics · Electromagnetic Waves · MCQ
Q119.The maximum number of possible interference maxima for slit-separation equal to twice the wavelength in Young's double-slit experiment, is :
Physics · Wave Optics · MCQ
Q120.The work function of a substance is $4.0 e V .$ The longest wavelength of light that can cause photo-electron emission from this substance is approximately.
Physics · Dual Nature of Radiation · MCQ
Q121.A radiation of energy $E$ falls normally on a perfectly reflecting surface. The momentum transferred to the surface is
Physics · Electromagnetic Waves · MCQ
Q122.According to Einstein's photoelectric equation, the plot of the kinetic energy of the emitted photo electrons from a metal $V s$ the frequency, of the incident radiation gives as straight the whose slope
Physics · Dual Nature of Radiation · MCQ
Q123.An $α$ -particle of energy $5 M e V$ is scattered through $18 0^{\circ}$ by a fixed uranium nucleus. The distance of closest approach is of the order of
Physics · Atoms and Nuclei · MCQ
Q124.The binding energy per nucleon of deuteron $(_{1}^{2} H)$ and helium nucleus $(_{2}^{4} H e)$ is $1.1 M e V$ and $7 M e V$ respectively. If two deuteron nuclei react to form a single helium nucleus, then the energy…
Physics · Atoms and Nuclei · MCQ
Q125.A piece of copper and another of germanium are cooled from room temperature to $77 K,$ the resistance of
Physics · Electronic Devices · MCQ
Q126.The angle of incidence at which reflected light is totally polarized for reflection from air to glass (refractive index $n$ ) is :
Physics · Wave Optics · MCQ
Q127.When $p$ - $n$ junction diode is forward biased then
Physics · Electronic Devices · MCQ
Q128.A current $i$ ampere flows along an infinitely long straight thin walled tube, then the magnetic induction at any point inside the tube is
Physics · Magnetics · MCQ
Q129.Four charges equal to - $Q$ are placed at the four corners of a square and a charge $q$ is at its center. If the system is in equilibrium the value of $q$ is
Physics · Electrostatics · MCQ
Q130.A charged oil drop is suspended in a uniform field of $3 \times 1 0^{4} v / m$ so that it neither falls nor rises. The charge on the drop will be (Take the mass of the charge $= 9.9 \times 1 0^{- 15} k g$ and $g = 10 m / s^{2}$ )
Physics · Electrostatics · MCQ
Q131.The resistance of the series combination of two resistances is $S .$ When they are jointed in parallel the total resistance is $P .$ If $S = n P$ then the Minimum possible value of $n$ is
Physics · Current Electricity · MCQ
Q132.An electric current is passed through a circuit containing two wires of the same material, connected in parallel. If the lengths and radii are in the ratio of $\frac{4}{3}$ and $\frac{2}{3}$ , then the ratio of the current passing through…
Physics · Current Electricity · MCQ
Q133.The total current supplied to the circuit by the battery is Includes diagram
Physics · Current Electricity · MCQ
Q134.Time taken by a $836 W$ heater to heat one litre of water from $10^{\circ} C$ to $40^{\circ} C$ is
Physics · Heat and Thermodynamics · MCQ
Q135.In a meter bridge experiment null point is obtained at $20 c m$ , from one end of the wire when resistance $X$ is balanced against another resistance $Y .$ If $X < Y$ , then where will be the new position of the null point from the same end,…
Physics · Current Electricity · MCQ
Q136.Thermistors are usually made of
Physics · Current Electricity · MCQ
Q137.The electrochemical equivalent of a metal is $3.3510 9^{- 7} k g$ per Coulomb. The mass of the metal liberated at the cathode when a $3 A$ current is passed for $2$ seconds will be
Physics · Current Electricity · MCQ
Q138.The thermo $e m f$ of a thermocouple varies with temperature $θ$ of the hot junction as $E = a θ + b θ^{2}$ in volts where the ratio $a / b$ is $70 0^{\circ} C .$ If the cold junction is kept at $0^{\circ} C,$ then the neutral…
Physics · Current Electricity · MCQ
Q139.The Kirchhoff's first law $(\sum i = 0)$ and second law $(\sum i R = \sum E),$ where the symbols have their usual meanings, are respectively based on
Physics · Current Electricity · MCQ
Q140.A material $^{'} B^{'}$ has twice the specific resistance of $^{'} A^{'} .$ A circular wire made of $^{'} B^{'}$ has twice the diameter of a wire made of $^{'} A^{'}$ . Then for the two wires to have the same resistance, the ratio $\frac{l}{B} / \frac{l}{A}$ of their…
Physics · Current Electricity · MCQ
Q141.Curie temperature is the temperature above which
Physics · Magnetic Properties of Matter · MCQ
Q142.A long wire carries a steady current. It is bent into a circle of one turn and the magnetic field at the centre of the coil is $B .$ It is then bent into a circular loop of $n$ turns. The magnetic field at the center of the coil will be
Physics · Magnetics · MCQ
Q143.The magnetic field due to a current carrying circular loop of radius $3 c m$ at a point on the axis at a distance of $4 c m$ from the centre is $54 μ T .$ What will be its value at the center of loop?
Physics · Magnetics · MCQ
Q144.The length of a magnet is large compared to its width and breadth. The time period of its oscillation in a vibration magnetometer is $2 s .$ The magnet is cut along its length into three equal parts and these parts are then placed on each…
Physics · Magnetic Properties of Matter · MCQ
Q145.Two long conductors, separated by a distance $d$ carry current $I_{1}$ and $I_{2}$ in the same direction. They exert a force $F$ on each other. Now the current in one of them is increased to two times and its direction is reversed. The…
Physics · Magnetics · MCQ
Q146.The materials suitable for making electromagnets should have
Physics · Magnetic Properties of Matter · MCQ
Q147.Alternating current can not be measured by $D . C .$ ammeter because
Physics · Alternating Current · MCQ
Q148.In an $L C R$ series $a . c .$ circuit, the voltage across each of the components, $L, C$ and $R$ is $50 V$ . The voltage across the $L . C$ combination will be :
Physics · Alternating Current · MCQ
Q149.A coil having $n$ turns and resistance $R Ω$ is connected with a galvanometer of resistance $4 R Ω.$ This combination is moved in time $t$ seconds from a magnetic field $W_{1}$ weber to $W_{2}$ weber. The induced current in the…
Physics · Electromagnetic Induction · MCQ
Q150.In a uniform magnetic field of induction $B$ a wire in the form of a semicircle of radius $r$ rotates about the diameter of the circle with an angular frequency $ω .$ The axis of rotation is perpendicular to the field. If the total…
Physics · Electromagnetic Induction · MCQ
Q151.A metal conductor of length $1 m$ rotates vertically about one of its ends at angular velocity $5$ radians per second. If the horizontal component of earth's magnetic field is $0.2 \times 1 0^{- 4} T,$ then the $e . m . f .$ developed between…
Physics · Electromagnetic Induction · MCQ
Q152.In a $L C R$ circuit capacitance is changed from $C$ to $2 C$ . For the resonant frequency to remain unchaged, the inductance should be changed from $L$ to
Physics · Alternating Current · MCQ
Q153.A plano convex lens of refractive index $1.5$ and radius of curvature $30 c m$ . Is silvered at the curved surface. Now this lens has been used to form the image of an object. At what distance from this lens an object be placed in order to…
Physics · Geometrical Optics · MCQ
Q154.A light ray is incident perpendicularly to one face of a $9 0^{\circ}$ prism and is totally internally reflected at the glass-air interface. If the angle of reflection is $4 5^{\circ}$ , we conclude that the refractive index $n$ Includes diagram
Physics · Geometrical Optics · MCQ
Q155.Two spherical conductors $B$ and $C$ having equal radii and carrying equal charges on them repel each other with a force $F$ when kept apart at some distance. A third spherical conductor having same radius as that $B$ but uncharged is…
Physics · Electrostatics · MCQ
Q156.If two soap bubbles of different radii are connected by a tube
Physics · Properties of Matter · MCQ
Q157.A particle moves in a straight line with retardation proportional to its displacement. Its loss of kinetic energy for any displacement $x$ is proportional to
Physics · Work Power and Energy · MCQ
Q158.A uniform chain of length $2 m$ is kept on a table such that a length of $60 c m$ hangs freely from the edge of the table. The total mass of the chain is $4 k g .$ What is the work done in pulling the entire chain on the table?
Physics · Work Power and Energy · MCQ
Q159.A force $F = (5 i + 3 j + 2 k) N$ is applied over a particle which displaces it from its origin to the point $r = (2 i - j) m .$ …
Physics · Work Power and Energy · MCQ
Q160.A body of mass $^{'} m^{'},$ acceleration uniformly from rest to $^{'} v_{1}^{'}$ in time $T$ . The instantaneous power delivered to the body as a function of time is given by
Physics · Work Power and Energy · MCQ
Q161.A particle is acted upon by a force of constant magnitude which is always perpendicular to the velocity of the particle, the motion of the particles takes place in a plane. It follows that
Physics · Work Power and Energy · MCQ
Q162.A machine gun fires a bullet of mass $40 g$ with a velocity $1200 m s^{- 1} .$ The man holding it can exert a maximum force of $144 N$ on the gun. How many bullets can he fire per second at the most?
Physics · Center of Mass · MCQ
Q163.One solid sphere $A$ and another hollow sphere $B$ are of same mass and same outer radii. Their moment of inertia about their diameters are respectively $I_{A}$ and $I_{B}$ such that
Physics · Rotational Motion · MCQ
Q164.A solid sphere is rotating in free space. If the radius of the sphere is increased keeping mass same which on of the following will not be affected ?
Physics · Rotational Motion · MCQ
Q165.A satellite of mass $m$ revolves around the earth of radius $R$ at a height $x$ from its surface. If $g$ is the acceleration due to gravity on the surface of the earth, the orbital speed of the satellite is
Physics · Gravitation · MCQ
Q166.If $g$ is the acceleration due to gravity on the earth's surface, the gain in the potential energy of an object of mass $m$ raised from the surface of the earth to a height equal to the radius $R$ of the earth is
Physics · Gravitation · MCQ
Q167.The time period of an earth satellite in circular orbit is independent of
Physics · Gravitation · MCQ
Q168.Suppose the gravitational force varies inversely as the nth power of distance. Then the time period of a planet in circular orbit of radius $R$ around the sun will be proportional to
Physics · Gravitation · MCQ
Q169.A wire fixed at the upper end stretches by length $l$ by applying a force $F .$ The work done in stretching is
Physics · Properties of Matter · MCQ
Q170.Spherical balls of radius $R$ are falling in a viscous fluid of viscosity $η$ with a velocity $v .$ The retarding viscous force acting on the spherical ball is
Physics · Properties of Matter · MCQ
Q171.One mole of ideal monatomic gas $(γ = 5/3)$ is mixed with one mole of diatomic gas $(γ = 7/5)$ . What is $γ$ for the mixture? $γ$ Denotes the ratio of specific heat at constant pressure,…
Physics · Heat and Thermodynamics · MCQ
Q172.If the temperature of the sun were to increase from $T$ to $2 T$ and its radius from $R$ to $2 R$ , then the ratio of the radiant energy received on earth to what it was previously will be
Physics · Heat and Thermodynamics · MCQ
Q173.Two thermally insulated vessels $1$ and $2$ are filled with air at temperatures $(T_{1}, T_{2}),$ volume $(V_{1}, V_{2})$ and pressure $(P_{1}, P_{2})$ respectively. If the value joining the…
Physics · Heat and Thermodynamics · MCQ
Q174.Which of the following statements is correct for any thermodynamic system ?
Physics · Heat and Thermodynamics · MCQ
Q175.The temperature of the two outer surfaces of a composite slab, consisting of two materials having coefficients of thermal conductivity $K$ and $2 K$ and thickness $x$ and $4 x,$ respectively, are $T_{2}$ and $T_{1} (T_{2} > T_{1}) .$ … Includes diagram
Physics · Heat and Thermodynamics · MCQ
Q176.The bob of a simple pendulum executes simple harmonic motion in water with a period $t,$ while the period of oscillation of the bob is $t_{0}$ in air. Neglecting frictional force of water and given that the density of the bob is $(4/3) \times 1000 k g / m^{3} .$ …
Physics · Simple Harmonic Motion · MCQ
Q177.A particle at the end of a spring executes $S . H . M$ with a period $t_{1}$ . While the corresponding period for another spring is $t_{2}$ . If the period of oscillation with the two springs in series is $T$ then
Physics · Simple Harmonic Motion · MCQ
Q178.The total energy of particle, executing simple harmonic motion is
Physics · Simple Harmonic Motion · MCQ
Q179.A particle of mass $m$ is attached to a spring (of spring constant $k$ ) and has a natural angular frequency $ω_{0} .$ An external force $F (t)$ proportional to $cos ω t (ω e ω_{0})$ is applied to the…
Physics · Simple Harmonic Motion · MCQ
Q180.The displacement $y$ of a particle in a medium can be expressed as, $y = 1 0^{- 6} sin$ $(100 t + 20 x + \frac{π}{4})$ $m$ where $t$ is in second and $x$ in meter. The speed of the wave is
Physics · Waves · MCQ
Q181.A charge particle $^{'} q^{'}$ is shot towards another charged particle $^{'} Q^{'}$ which is fixed, with a speed $^{'} v^{'}$ . It approaches $^{'} Q^{'}$ upto a closest distance $r$ and then returns. If $q$ were given a speed of $^{'} 2 v^{'}$ the closest distances of…
Physics · Electrostatics · MCQ
Q182.Two masses $m_{1} = 5 k g$ and $m_{2} = 4.8 k g$ tied to a string are hanging over a light frictionless pulley. What is the acceleration of the masses when left free to move? $(g = 9.8 m / s^{2})$ Includes diagram
Physics · Laws of Motion · MCQ
Q183.Which one of the following represents the correct dimensions of the coefficient of viscosity?
Physics · Units and Measurements · MCQ
Q184.A ball is released from the top of a tower of height h meters. It takes T seconds to reach the ground. What is the position of the ball in $\frac{T}{3}$ seconds?
Physics · Motion in A Straight Line · MCQ
Q185.If $A \times B = B \times A$ , then the angle beetween A and B is
Physics · Vector Algebra · MCQ
Q186.A projectile can have the same range 'R' for two angles of projection. If T1 and T2 be the time of flights in the two cases, then the product of the two time of flights is directly proportional to
Physics · Motion in A Plane · MCQ
Q187.Which of the following statements is FALSE for a particle moving in a circle with a constant angular speed?
Physics · Circular Motion · MCQ
Q188.An automobile travelling with speed of 60 km/h, can brake to stop within a distance of 20 m. If the car is going twice as fast, i.e 120 km/h, the stopping distance will be
Physics · Motion in A Straight Line · MCQ
Q189.A ball is thrown from a point with a speed ν0 at an angle of projection θ. From the same point and at the same instant person starts running with a constant speed $\frac{v _{0}}{2}$ to catch the ball. Will the person be able to catch the…
Physics · Motion in A Plane · MCQ
Q190.A block rests on a rough inclined plane `making an angle of $3 0^{\circ}$ with the horizontal. The coefficient of static friction between the block and the plane is $0.8.$ If the frictionless force on the block is $10 N,$ the mass of the…
Physics · Laws of Motion · MCQ