2002 · Shift 0

184 questions · JEE Main

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2002 · Shift 0

2002 · Shift 0

184 questions · JEE Main

Chemistry61 questions Mathematics53 questions Physics70 questions

ThermodynamicsChemistry · 4 questions Ionic EquilibriumChemistry · 3 questions Chemical EquilibriumChemistry · 2 questions Basics of Organic ChemistryChemistry · 6 questions BiomoleculesChemistry · 2 questions Chemical Bonding and Molecular StructureChemistry · 6 questions Haloalkanes and HaloarenesChemistry · 1 questions HydrocarbonsChemistry · 3 questions SolutionsChemistry · 2 questions D and F Block ElementsChemistry · 4 questions Compounds Containing NitrogenChemistry · 1 questions Periodic Table and PeriodicityChemistry · 2 questions Aldehydes Ketones and Carboxylic AcidsChemistry · 3 questions Coordination CompoundsChemistry · 3 questions ElectrochemistryChemistry · 6 questions Redox ReactionsChemistry · 1 questions Chemical Kinetics and Nuclear ChemistryChemistry · 6 questions P Block ElementsChemistry · 1 questions Some Basic Concepts of ChemistryChemistry · 3 questions Structure of AtomChemistry · 2 questions Limits Continuity and DifferentiabilityMathematics · 8 questions StatisticsMathematics · 1 questions FunctionsMathematics · 3 questions Straight Lines and Pair of Straight LinesMathematics · 2 questions Definite IntegrationMathematics · 5 questions DifferentiationMathematics · 1 questions Inverse Trigonometric FunctionsMathematics · 1 questions Application of DerivativesMathematics · 1 questions Matrices and DeterminantsMathematics · 1 questions CircleMathematics · 2 questions Area Under the CurvesMathematics · 1 questions Differential EquationsMathematics · 2 questions ProbabilityMathematics · 2 questions Vector AlgebraMathematics · 5 questions Permutations and CombinationsMathematics · 4 questions Complex NumbersMathematics · 3 questions Quadratic Equation and InequalitiesMathematics · 5 questions Binomial TheoremMathematics · 2 questions Sequences and SeriesMathematics · 4 questions Electronic DevicesPhysics · 3 questions Electromagnetic WavesPhysics · 2 questions Geometrical OpticsPhysics · 4 questions Current ElectricityPhysics · 5 questions MagneticsPhysics · 5 questions Alternating CurrentPhysics · 2 questions Electromagnetic InductionPhysics · 2 questions Atoms and NucleiPhysics · 1 questions Dual Nature of RadiationPhysics · 2 questions CapacitorPhysics · 2 questions Rotational MotionPhysics · 4 questions GravitationPhysics · 4 questions Work Power and EnergyPhysics · 3 questions Laws of MotionPhysics · 6 questions Heat and ThermodynamicsPhysics · 8 questions Simple Harmonic MotionPhysics · 3 questions WavesPhysics · 5 questions ElectrostaticsPhysics · 3 questions Units and MeasurementsPhysics · 1 questions Motion in A Straight LinePhysics · 2 questions Properties of MatterPhysics · 1 questions Center of MassPhysics · 1 questions Circular MotionPhysics · 1 questions

Q1.If an endothermic reaction is non-spontaneous at freezing point of water and becomes feasible at its boiling point, then :
Chemistry · Thermodynamics · MCQ
Q2.For the reactions 2C + $O_{2}$ $\to$ 2 $C O_{2}$ ; $Δ H$ = -393 J 2Zn + $O_{2}$ $\to$ 2 $Z n O$ ; $Δ H$ = -412 J
Chemistry · Thermodynamics · MCQ
Q3.The heat required to raise the temperature of body by 1 K is called :
Chemistry · Thermodynamics · MCQ
Q4.A heat engine absorbs heat Q1 at temperature T1 and heat Q2 at temperature T2. Work done by the engine is J (Q1 + Q2). This data :
Chemistry · Thermodynamics · MCQ
Q5.1 M NaCL and 1 M HCL are present in an aqueous solution. The solution is
Chemistry · Ionic Equilibrium · MCQ
Q6.Let the solubility of an aqueous solution of $M g (O H)_{2}$ be x then its Ksp is :
Chemistry · Ionic Equilibrium · MCQ
Q7.Species acting as both Bronsted acid and base is :
Chemistry · Ionic Equilibrium · MCQ
Q8.Change in volume of the system does not alter which of the following equilibria?
Chemistry · Chemical Equilibrium · MCQ
Q9.For the reaction $C O$ (g) + (1/2) $O_{2}$ (g) $⇋$ $C O_{2}$ (g), Kp/Kc is :
Chemistry · Chemical Equilibrium · MCQ
Q10.A similarity between optical and geometrical isomerism is that
Chemistry · Basics of Organic Chemistry · MCQ
Q11.The functional group, which is found in amino acid is
Chemistry · Biomolecules · MCQ
Q12.Which of the following does not show geometrical isomerism?
Chemistry · Basics of Organic Chemistry · MCQ
Q13.Arrangement of $(C H_{3})_{3} C^{-}$ , $(C H_{3})_{2} C H^{-}$ , $C H_{3} - C H_{2} -$ when attached to benzyl or an unsaturated group in increasing order of inductive effect is
Chemistry · Basics of Organic Chemistry · MCQ
Q14.In which of the following species is the underlined carbon having sp3 hybridisation?
Chemistry · Chemical Bonding and Molecular Structure · MCQ
Q15.The reaction : $(C H)_{3} C - B r H_{2} O (C H)_{3} C - O H$
Chemistry · Haloalkanes and Haloarenes · MCQ
Q16.Racemic mixture is formed by mixing two
Chemistry · Basics of Organic Chemistry · MCQ
Q17.Which of these will not react with acetylene ?
Chemistry · Hydrocarbons · MCQ
Q18.What is the product when acetylene reacts with hypochlorous acid ?
Chemistry · Hydrocarbons · MCQ
Q19.In a mixture of A and B, components show negative deviation when :
Chemistry · Solutions · MCQ
Q20.Freezing point of an aqueous solution is (-0.186)oC. Elevation of boiling point of the same solution is Kb = 0.512 oC, Kf = 1.86 oC, find the increase in boiling point.
Chemistry · Solutions · MCQ
Q21.RNA is different from DNA because RNA contains
Chemistry · Biomolecules · MCQ
Q22.How do we differentiate between $F e^{3 +}$ and $C r^{3 +}$ in group III?
Chemistry · D and F Block Elements · MCQ
Q23.When primary amine reacts with chloroform in ethanoic KOH then the product is
Chemistry · Compounds Containing Nitrogen · MCQ
Q24.Which of the following compounds has wrong $I U P A C$ name ?
Chemistry · Basics of Organic Chemistry · MCQ
Q25.Following types of compounds (as $I, I I$ ) are studied in terms of isomerism in : Includes diagram
Chemistry · Basics of Organic Chemistry · MCQ
Q26.The correct order of ionic radius is
Chemistry · Periodic Table and Periodicity · MCQ
Q27. $C e^{+ 3}, L a^{+ 3}, P m^{+ 3}$ and $Y b^{+ 3}$ have ionic radial in the increasing order as
Chemistry · Periodic Table and Periodicity · MCQ
Q28. Includes diagram
Chemistry · Aldehydes Ketones and Carboxylic Acids · MCQ
Q29.Picric acid is :
Chemistry · Aldehydes Ketones and Carboxylic Acids · MCQ
Q30.The type isomerism present in nitropentammine chromium $(I I I)$ chloride is :
Chemistry · Coordination Compounds · MCQ
Q31.Conductivity (Seimen’s S) is directly proportional to area of the vessel and the concentration of the solution in it and is inversely proportional to the length of the vessel then, then constant of proportionality is expressed in :
Chemistry · Electrochemistry · MCQ
Q32.For the following cell with hydrogen electrodes at two different pressure p1 and p2. What will be the emf for the given cell : $P t (H_{2}) ∣ H^{+} (a q) ∣ P t (H_{2}) p_{1} 1 M p_{2}$ …
Chemistry · Electrochemistry · MCQ
Q33.EMF of a cell in terms of reduction potential of its left and right electrodes is :
Chemistry · Electrochemistry · MCQ
Q34.Which of the following reaction is possible at anode?
Chemistry · Electrochemistry · MCQ
Q35.When the sample of copper with zinc impurity is to be purified by electrolysis, the appropriate electrodes are :
Chemistry · Electrochemistry · MCQ
Q36.Which of the following is a redox reaction ?
Chemistry · Redox Reactions · MCQ
Q37.Units of rate constant of first and zero order reactions in terms of molarity M unit are respectively
Chemistry · Chemical Kinetics and Nuclear Chemistry · MCQ
Q38.For the reaction A + 2B $\to$ C, rate is given by R = [A] [B]2 then the order of the reaction is
Chemistry · Chemical Kinetics and Nuclear Chemistry · MCQ
Q39.The differential rate law for the reaction $H_{2}$ + $I_{2}$ $\to$ 2 $H I$ is
Chemistry · Chemical Kinetics and Nuclear Chemistry · MCQ
Q40.If half-life of a substance is 5 yrs, then the total amount of substance left after 15 years, when initial amount is 64 grams is
Chemistry · Chemical Kinetics and Nuclear Chemistry · MCQ
Q41. $β$ - particle is emitted in radioactivity by
Chemistry · Chemical Kinetics and Nuclear Chemistry · MCQ
Q42.The integrated rate equation is Rt = log C0 - log Ct . The straight line graph is obtained by plotting
Chemistry · Chemical Kinetics and Nuclear Chemistry · MCQ
Q43.Which of the following statements is true?
Chemistry · Chemical Bonding and Molecular Structure · MCQ
Q44.Oxidation number of Cl in $C a O C l_{2}$ (bleaching powder) is :
Chemistry · P Block Elements · MCQ
Q45.When $K M n O_{4}$ acts as an oxidising agent and ultimately forms $[M n O_{4}]^{2 -}$ , $M n O_{2}$ , $M n_{2} O_{3}$ , $M n^{2 +}$ then the number of electrons transferred in each case respectively is :
Chemistry · D and F Block Elements · MCQ
Q46.Which of the following ions has the maximum magnetic moment?
Chemistry · D and F Block Elements · MCQ
Q47.Most common oxidation states of Ce (cerium) are :
Chemistry · D and F Block Elements · MCQ
Q48.A square planar complex is formed by hybridisation of which atomic orbitals ?
Chemistry · Chemical Bonding and Molecular Structure · MCQ
Q49.The most stable ion is :
Chemistry · Coordination Compounds · MCQ
Q50. $C H_{3}$ - $M g$ - $B r$ is an organometallic compound due to :
Chemistry · Coordination Compounds · MCQ
Q51.What is B? Includes diagram
Chemistry · Aldehydes Ketones and Carboxylic Acids · MCQ
Q52.With increase of temperature, which of these changes?
Chemistry · Some Basic Concepts of Chemistry · MCQ
Q53.In a compound C, H and N atoms are present in 9 : 1 : 3.5 by weight . Molecular weight of the compound is 108 g mol-1 . Molecular formula of compound is
Chemistry · Some Basic Concepts of Chemistry · MCQ
Q54.Number of atoms in 558.5 gram Fe (at. wt. of Fe = 55.85 g mol-1) is
Chemistry · Some Basic Concepts of Chemistry · MCQ
Q55.Uncertainty in position of a minute particle of mass 25 g in space is 10-5 m. What is the uncertainty in its velocity (in ms-1) (h = 6.6 $\times$ 10-34 Js)
Chemistry · Structure of Atom · MCQ
Q56.In a hydrogen atom, if energy of an electron in ground state is -13.6 eV, then that in the 2nd excited state is
Chemistry · Structure of Atom · MCQ
Q57.In which of the following species the interatomic bond angle is 109o28' ?
Chemistry · Chemical Bonding and Molecular Structure · MCQ
Q58.Hybridisation of underline atom changes in
Chemistry · Chemical Bonding and Molecular Structure · MCQ
Q59.Which of the following are arranged in an increasing order of their bond strengths?
Chemistry · Chemical Bonding and Molecular Structure · MCQ
Q60.Acetylene does not react with :
Chemistry · Hydrocarbons · MCQ
Q61.For a cell given below $Ag^{+} + e^{-} Cu^{2 +} + 2 e^{-} ⟶ Ag; E^{\circ} = x ⟶ Cu; E^{\circ} = y$ $E^{\circ} cell is$ … Includes diagram
Chemistry · Electrochemistry · MCQ
Q62.f(x) and g(x) are two differentiable functions on [0, 2] such that f''(x) - g''(x) = 0, f'(1) = 2, g'(1) = 4, f(2) = 3, g(2) = 9 then f(x) - g(x) at x = $\frac{3}{2}$ is
Mathematics · Limits Continuity and Differentiability · MCQ
Q63.In a class of 100 students there are 70 boys whose average marks in a subject are 75. If the average marks of the complete class is 72, then what is the average marks of the girls?
Mathematics · Statistics · MCQ
Q64. $x \to 0 lim \frac{1 - c o s 2 x}{2 x}$ is
Mathematics · Limits Continuity and Differentiability · MCQ
Q65.The domain of $sin^{- 1} [lo g_{3} (\frac{x}{3})]$ is
Mathematics · Functions · MCQ
Q66.Let $f (2) = 4$ and $f^{'} (x) = 4.$ Then $x \to 2 lim \frac{x f ( 2 ) - 2 f ( x )}{x - 2}$ is given by
Mathematics · Limits Continuity and Differentiability · MCQ
Q67. $x \to \infty lim (\frac{x ^{2} + 5 x + 3}{x ^{2} + x + 2})^{x}$
Mathematics · Limits Continuity and Differentiability · MCQ
Q68. $x \to 0 lim \frac{l o g x ^{n} - [ x ]}{[ x ]}$ , $n \in N$ , ( [x] denotes the greatest integer less than or equal to x )
Mathematics · Limits Continuity and Differentiability · MCQ
Q69.If $f (1) = 1, f^{'} (1) = 2,$ then $x \to 1 lim \frac{f ( x ) - 1}{x - 1}$ is
Mathematics · Limits Continuity and Differentiability · MCQ
Q70. $f$ is defined in $[- 5, 5]$ as $f (x) = x$ if $x$ is rational $= - x$ if $x$ is irrational. Then
Mathematics · Limits Continuity and Differentiability · MCQ
Q71.If f(x + y) = f(x).f(y) $\forall$ x, y and f(5) = 2, f'(0) = 3, then f'(5) is
Mathematics · Limits Continuity and Differentiability · MCQ
Q72.A triangle with vertices $(4, 0), (- 1, - 1), (3, 5)$ is :
Mathematics · Straight Lines and Pair of Straight Lines · MCQ
Q73.Locus of mid point of the portion between the axes of $x cos α + y sin α = p$ where $p$ is constant is :
Mathematics · Straight Lines and Pair of Straight Lines · MCQ
Q74.If $y = f (x)$ makes + $v e$ intercept of $2$ and $0$ unit on $x$ and $y$ axes and encloses an area of $3/4$ square unit with the axes then $0 \int 2 x f^{'} (x) d x$ is
Mathematics · Definite Integration · MCQ
Q75.If $y = (x + 1 + x^{2})^{n},$ then $(1 + x^{2}) \frac{d ^{2} y}{d x ^{2}} + x \frac{d y}{d x}$ is
Mathematics · Differentiation · MCQ
Q76. $cot^{- 1} (cos α) - tan^{- 1} (cos α) = x,$ then sin x is equal to :
Mathematics · Inverse Trigonometric Functions · MCQ
Q77.The maximum distance from origin of a point on the curve $x = a sin t - b sin (\frac{a t}{b}) y = a cos t - b cos (\frac{a t}{b}),$ both $a, b > 0$ is
Mathematics · Application of Derivatives · MCQ
Q78.If $a > 0$ and discriminant of $a x^{2} + 2 b x + c$ is $- v e$ , then $a b a x + b b c b x + c a x + b b x + c 0$ is equal to
Mathematics · Matrices and Determinants · MCQ
Q79. $I_{n} = 0 \int π /4 tan^{n} x d x$ then $n \to \infty lim n [I_{n} + I_{n + 2}]$ equals
Mathematics · Definite Integration · MCQ
Q80. $0 \int 10 π ∣ sin x ∣ d x$ is
Mathematics · Definite Integration · MCQ
Q81. $0 \int 2 [x^{2}] d x$ is
Mathematics · Definite Integration · MCQ
Q82. $\int_{- π}^{π} \frac{2 x ( 1 + s i n x )}{1 + c o s ^{2} x} d x$ is
Mathematics · Definite Integration · MCQ
Q83.The equation of a circle with origin as a center and passing through an equilateral triangle whose median is of length $3 a$ is :
Mathematics · Circle · MCQ
Q84.The area bounded by the curves $y = ln x, y = ln ∣ x ∣, y = ∣ ln x ∣$ and $y = ∣ ln ∣ x ∣ ∣$ is :
Mathematics · Area Under the Curves · MCQ
Q85.The solution of the equation $\frac{d ^{2} y}{d x ^{2}} = e^{- 2 x}$
Mathematics · Differential Equations · MCQ
Q86.The order and degree of the differential equation $(1 + 3 \frac{d y}{d x})^{2/3} = 4 \frac{d ^{3} y}{d x ^{3}}$ are
Mathematics · Differential Equations · MCQ
Q87.A problem in mathematics is given to three students $A, B, C$ and their respective probability of solving the problem is $\frac{1}{2}, \frac{1}{3}$ and $\frac{1}{4} .$ Probability that the problem is solved is :
Mathematics · Probability · MCQ
Q88. $A$ and $B$ are events such that $P (A \cup B) = 3/4$ , $P (A \cap B) = 1/4, P (\overline{A}) = 2/3$ then $P (\overline{A} \cap B)$ is :
Mathematics · Probability · MCQ
Q89.If $a = 4, b = 2$ and the angle between $a$ and $b$ is $π /6$ then $(a \times b)^{2}$ …
Mathematics · Vector Algebra · MCQ
Q90.If the vectors $a, b$ and $c$ from the sides $B C, C A$ and $A B$ respectively of a triangle $A B C$ , then :
Mathematics · Vector Algebra · MCQ
Q91.If $a = 5, b = 4, c = 3$ thus what will be the value of $a . b + b . c + c . a,$ …
Mathematics · Vector Algebra · MCQ
Q92. $a = 3 i - 5 j$ and $b = 6 i + 3 j$ are two vectors and $c$ is a vector such that $c = a \times b$ then $a : b : c$ …
Mathematics · Vector Algebra · MCQ
Q93.If the vectors $c, a = x i + y j + z k$ and $b = j$ are such that $a, c$ and $b$ form a right handed system then $c$ …
Mathematics · Vector Algebra · MCQ
Q94.Total number of four digit odd numbers that can be formed using 0, 1, 2, 3, 5, 7 (using repetition allowed) are :
Mathematics · Permutations and Combinations · MCQ
Q95.The period of $sin^{2} θ$ is
Mathematics · Functions · MCQ
Q96.Which one is not periodic?
Mathematics · Functions · MCQ
Q97.z and w are two nonzero complex numbers such that $∣ z ∣ = ∣ w ∣$ and Arg z + Arg w = $π$ then z equals
Mathematics · Complex Numbers · MCQ
Q98.If $∣ z - 4 ∣ < ∣ z - 2 ∣$ , its solution is given by :
Mathematics · Complex Numbers · MCQ
Q99.The locus of the centre of a circle which touches the circle $∣ z - z_{1} ∣ = a$ and $∣ z - z_{2} ∣ = b$ externally ( $z, z_{1} & z_{2}$ are complex numbers) will be :
Mathematics · Complex Numbers · MCQ
Q100.If $α e β$ but $α^{2} = 5 α - 3$ and $β^{2} = 5 β - 3$ then the equation having $α / β$ and $β / α$ as its roots is
Mathematics · Quadratic Equation and Inequalities · MCQ
Q101.Product of real roots of equation $t^{2} x^{2} + ∣ x ∣ + 9 = 0$
Mathematics · Quadratic Equation and Inequalities · MCQ
Q102.Difference between the corresponding roots of $x^{2} + a x + b = 0$ and $x^{2} + b x + a = 0$ is same and $a e b,$ then
Mathematics · Quadratic Equation and Inequalities · MCQ
Q103.If $p$ and $q$ are the roots of the equation $x^{2} + p x + q = 0,$ then
Mathematics · Quadratic Equation and Inequalities · MCQ
Q104.If $a, b, c$ are distinct $+ v e$ real numbers and $a^{2} + b^{2} + c^{2} = 1$ then $ab + b c + c a$ is
Mathematics · Quadratic Equation and Inequalities · MCQ
Q105.The coefficients of $x^{p}$ and $x^{q}$ in the expansion of $(1 + x)^{p + q}$ are
Mathematics · Binomial Theorem · MCQ
Q106.The positive integer just greater than $(1 + 0.0001)^{10000}$ is
Mathematics · Binomial Theorem · MCQ
Q107.Number greater than 1000 but less than 4000 is formed using the digits 0, 1, 2, 3, 4 (repetition allowed). Their number is :
Mathematics · Permutations and Combinations · MCQ
Q108.The sum of integers from 1 to 100 that are divisible by 2 or 5 is :
Mathematics · Permutations and Combinations · MCQ
Q109.Five digit number divisible by 3 is formed using 0, 1, 2, 3, 4 and 5 without repetition. Total number of such numbers are :
Mathematics · Permutations and Combinations · MCQ
Q110.If 1, $lo g_{9} (3^{1 - x} + 2), lo g_{3} (4. 3^{x} - 1)$ are in A.P. then x equals
Mathematics · Sequences and Series · MCQ
Q111.l, m, n are the $p^{t h}$ , $q^{t h}$ and $r^{t h}$ term of a G.P all positive, $t h e n lo g l lo g m lo g n p q r 111 e q u a l s$
Mathematics · Sequences and Series · MCQ
Q112.Fifth term of a GP is 2, then the product of its 9 terms is
Mathematics · Sequences and Series · MCQ
Q113.Sum of infinite number of terms of GP is 20 and sum of their square is 100. The common ratio of GP is
Mathematics · Sequences and Series · MCQ
Q114.If the chord y = mx + 1 of the circle $x^{2} + y^{2} = 1$ subtends an angle of measure $4 5^{\circ}$ at the major segment of the circle then value of m is :
Mathematics · Circle · MCQ
Q115.The energy band gap is maximum in
Physics · Electronic Devices · MCQ
Q116.Which of the following are not electromagnetic waves?
Physics · Electromagnetic Waves · MCQ
Q117.If two mirrors are kept at $6 0^{\circ}$ to each other, then the number of images formed by them is
Physics · Geometrical Optics · MCQ
Q118.A wire when connected to $220 V$ mains supply has power dissipation $P_{1} .$ Now the wire is cut into two equal pieces which are connected in parallel to the same supply. Power dissipation in this case is $P_{2} .$ Then $P_{2} : P_{1}$ is
Physics · Current Electricity · MCQ
Q119.If $θ_{1},$ is the inversion temperature, $θ_{n}$ is the neutral temperature, $θ_{c}$ is the temperature of the cold junction, then
Physics · Current Electricity · MCQ
Q120.The mass of product liberated on anode in an electrochemical cell depends on (where $t$ is the time period for which the current is passed).
Physics · Current Electricity · MCQ
Q121.If a current is passed through a spring then the spring will
Physics · Magnetics · MCQ
Q122.If in the circuit, power dissipation is $150 W,$ then $R$ is Includes diagram
Physics · Current Electricity · MCQ
Q123.If in a circular coil $A$ of radius $R,$ current $I$ is flowing and in another coil $B$ of radius $2 R$ a current $2 I$ is flowing, then the ratio of the magnetic fields $B_{A}$ and $B_{B}$ , produced by them will be
Physics · Magnetics · MCQ
Q124.If an electron and a proton having same momentum enter perpendicular to a magnetic field, then
Physics · Magnetics · MCQ
Q125.The time period of a charged particle undergoing a circular motion in a uniform magnetic field is independent of its
Physics · Magnetics · MCQ
Q126.Wires $1$ and $2$ carrying currents $i_{1}$ and $i_{2}$ respectively are inclined at an angle $θ$ to each other. What is the force on a small element $d l$ of wire $2$ at a distance of $r$ from wire $1$ (as shown in figure) due to the… Includes diagram
Physics · Magnetics · MCQ
Q127.The power factor of $A C$ circuit having resistance $(R)$ and inductance $(L)$ connected in series and an angular velocity $ω$ is
Physics · Alternating Current · MCQ
Q128.In a transformer, number of turns in the primary coil are $140$ and that in the secondary coil are $280.$ If current in primary coil is $4 A,$ then that in the secondary coil is
Physics · Alternating Current · MCQ
Q129.An astronomical telescope has a large aperture to
Physics · Geometrical Optics · MCQ
Q130.Electromagnetic waves are transverse in nature is evident by
Physics · Electromagnetic Waves · MCQ
Q131.Wavelength of light used in an optical instrument are $λ_{1} = 4000 A \circ$ and $λ_{2} = 5000 A \circ,$ then ratio of their respective resolving powers (corresponding to $λ_{1}$ and $λ_{2}$ …
Physics · Geometrical Optics · MCQ
Q132.Which of the following is used in optical fibres?
Physics · Geometrical Optics · MCQ
Q133.The inductance between $A$ and $D$ is Includes diagram
Physics · Electromagnetic Induction · MCQ
Q134.A conducting square loop of side $L$ and resistance $R$ moves in its plane with a uniform velocity $v$ perpendicular to one of its sides. A magnetic induction $B$ constant in time and space, pointing perpendicular and into the plane at the… Includes diagram
Physics · Electromagnetic Induction · MCQ
Q135.If $13.6 e V$ energy is required to ionize the hydrogen atom, then the energy required to remove an electron from $n = 2$ is
Physics · Atoms and Nuclei · MCQ
Q136.At absolute zero, Si acts as
Physics · Electronic Devices · MCQ
Q137.Sodium and copper have work functions $2.3 e V$ and $4.5 e V$ respectively. Then the ratio of the wavelengths is nearest to
Physics · Dual Nature of Radiation · MCQ
Q138.Formation of covalent bonds in compounds exhibits
Physics · Dual Nature of Radiation · MCQ
Q139.By increasing the temperature, the specific resistance of a conductor and a semiconductor
Physics · Electronic Devices · MCQ
Q140.Capacitance (in $F$ ) of a spherical conductor with radius $1 m$ is
Physics · Capacitor · MCQ
Q141.Moment of inertia of a circular wire of mass $M$ and radius $R$ about its diameter is
Physics · Rotational Motion · MCQ
Q142.The escape velocity of a body depends upon mass as
Physics · Gravitation · MCQ
Q143.A spring of force constant $800 N / m$ has an extension of $5 c m .$ The work done in extending it from $5 c m$ to $15 c m$ is
Physics · Work Power and Energy · MCQ
Q144.One end of a mass-less rope, which passes over a mass-less and friction-less pulley $P$ is tied to a hook $C$ while the other end is free. Maximum tension that the rope can bear is $360 N .$ With what value of maximum safe acceleration (in $m s^{- 2}$ … Includes diagram
Physics · Laws of Motion · MCQ
Q145.Infrared radiation is detected by
Physics · Heat and Thermodynamics · MCQ
Q146.Heat given to a body which raises its temperature by $1^{\circ} C$ is
Physics · Heat and Thermodynamics · MCQ
Q147.Which of the following is more close to a black body?
Physics · Heat and Thermodynamics · MCQ
Q148.If mass-energy equivalence is taken into account, when water is cooled to form ice, the mass of water should
Physics · Heat and Thermodynamics · MCQ
Q149.Cooking gas containers are kept in a lorry moving with uniform speed. The temperature of the gas molecules inside will
Physics · Heat and Thermodynamics · MCQ
Q150.At what temperature is the $r . m . s$ velocity of a hydrogen molecule equal to that of an oxygen molecule at $4 7^{\circ} C ?$
Physics · Heat and Thermodynamics · MCQ
Q151.Two spheres of the same material have radii $1 m$ and $4 m$ and temperatures $4000 K$ and $2000 K$ respectively. The ratio of the energy radiated per second by the first sphere to that by the second is
Physics · Heat and Thermodynamics · MCQ
Q152.1 mole of a gas with $γ = 7/5$ is mixed with $1$ mole of a gas with $γ = 5/3,$ then the value of $γ$ for the resulting mixture is
Physics · Heat and Thermodynamics · MCQ
Q153.If a spring has time period $T,$ and is cut into $n$ equal parts, then the time period of each part will be
Physics · Simple Harmonic Motion · MCQ
Q154.In a simple harmonic oscillator, at the mean position
Physics · Simple Harmonic Motion · MCQ
Q155.A child swinging on a swing in sitting position, stands up, then the time period of the swing will
Physics · Simple Harmonic Motion · MCQ
Q156.length of a string tied to two rigid supports is $40 c m$ . Maximum length (wavelength in $c m$ ) of a stationary wave produced on it is
Physics · Waves · MCQ
Q157.A tuning fork arrangement (pair) produces $4$ beats/sec with one fork of frequency $288 c p s .$ A little wax is placed on the unknown fork and it then produces $2$ beats/sec. The frequency of the unknown fork is
Physics · Waves · MCQ
Q158.Tube $A$ has bolt ends open while tube $B$ has one end closed, otherwise they are identical. The ratio of fundamental frequency of tube $A$ and $B$ is
Physics · Waves · MCQ
Q159.A wave $y = a$ $sin (ω t - k x)$ on a string meets with another wave producing a node at $x = 0.$ Then the equation of the unknown wave is
Physics · Waves · MCQ
Q160.When temperature increases, the frequency of a tuning fork
Physics · Waves · MCQ
Q161.On moving a charge of $20$ coulomb by $2 c m, 2 J$ of work is done, then the potential differences between the points is
Physics · Electrostatics · MCQ
Q162.If there are $n$ capacitors in parallel connected to $V$ volt source, then the energy stored is equal to
Physics · Capacitor · MCQ
Q163.A charged particle $q$ is placed at the centre $O$ of cube of length $L (A B C D E F G H) .$ Another same charge $q$ is placed at a distance $L$ from $O$ . Then the electric flux through $A B C D$ is Includes diagram
Physics · Electrostatics · MCQ
Q164.If a charge $q$ is placed at the center of the line joining two equal charges $Q$ such that the system is in equilibrium then the value of $q$ is
Physics · Electrostatics · MCQ
Q165.If an ammeter is to be used in place of a voltmeter, then we must connect with the ammeter a
Physics · Current Electricity · MCQ
Q166.The kinetic energy needed to project a body of mass $m$ from the earth surface (radius $R$ ) to infinity is
Physics · Gravitation · MCQ
Q167.Identify the pair whose dimensions are equal
Physics · Units and Measurements · MCQ
Q168.A ball whose kinetic energy E, is projected at an angle of $4 5^{\circ}$ to the horizontal. The kinetic energy of the ball at the highest point of its height will be
Physics · Work Power and Energy · MCQ
Q169.From a building two balls A and B are thrown such that A is thrown upwards and B downwards ( both vertically with the same speed ). If vA and vB are their respective velocities on reaching the ground, then
Physics · Motion in A Straight Line · MCQ
Q170.If a body looses half of its velocity on penetrating $3 c m$ in a wooden block, then how much will it penetrate more before coming to rest?
Physics · Work Power and Energy · MCQ
Q171.A lift is moving down with acceleration $a .$ A man in the lift drops a ball inside the lift. The acceleration of the ball as observed by the man in the lift and a man standing stationary on the ground are respectively
Physics · Laws of Motion · MCQ
Q172.When forces $F_{1}, F_{2}, F_{3}$ are acting on a particle of mass $m$ such that $F_{2}$ and $F_{3}$ are mutually perpendicular, then the particle remains stationary. If the force $F_{1}$ is now removed then the acceleration of the…
Physics · Laws of Motion · MCQ
Q173.Two forces are such that the sum of their magnitudes is $18 N$ and their resultant is $12 N$ which is perpendicular to the smaller force. Then the magnitudes of the forces are
Physics · Laws of Motion · MCQ
Q174.A light string passing over a smooth light pulley connects two blocks of masses $m_{1}$ and $m_{2}$ (vertically). If the acceleration of the system is $g /8$ , then the ratio of the masses is
Physics · Laws of Motion · MCQ
Q175.Three identical blocks of masses $m = 2 k g$ are drawn by a force $F = 10.2 N$ with an acceleration of $0.6 m s^{- 2}$ on a frictionless surface, then what is the tension (in $N$ ) in the string between the blocks $B$ and $C$ ? Includes diagram
Physics · Laws of Motion · MCQ
Q176.Speeds of two identical cars are $u$ and $4 u$ at the specific instant. The ratio of the respective distances in which the two cars are stopped from that instant is :
Physics · Motion in A Straight Line · MCQ
Q177.A cylinder of height $20 m$ is completely filled with water. The velocity of efflux of water (in $m s^{- 1}$ ) through a small hole on the side wall of the cylinder near its bottom is
Physics · Properties of Matter · MCQ
Q178.Initial angular velocity of a circular disc of mass $M$ is $ω_{1} .$ Then two small spheres of mass $m$ are attached gently to diametrically opposite points on the edge of the disc. What is the final angular velocity of the disc?
Physics · Rotational Motion · MCQ
Q179.Two identical particles move towards each other with velocity $2 v$ and $v$ respectively. The velocity of center of mass is
Physics · Center of Mass · MCQ
Q180.The minimum velocity (in $m s^{- 1}$ ) with which a car driver must traverse a flat curve of radius 150 m and coefficient of friction $0.6$ to avoid skidding is
Physics · Circular Motion · MCQ
Q181.A solid sphere, a hollow sphere and a ring are released from top of an inclined plane (frictionless) so that they slide down the plane. Then maximum acceleration down the plane is for (no rolling)
Physics · Rotational Motion · MCQ
Q182.A particle of mass $m$ moves along line PC with velocity $v$ as shown. What is the angular momentum of the particle about P? Includes diagram
Physics · Rotational Motion · MCQ
Q183.If suddenly the gravitational force of attraction between Earth and a satellite revolving around it becomes zero, then the satellite will
Physics · Gravitation · MCQ
Q184.Energy required to move a body of mass $m$ from an orbit of radius $2 R$ to $3 R$ is
Physics · Gravitation · MCQ