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Physics · 2004 · Shift 0

74 questions from this JEE Main paper

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2004 · Shift 0
Physics

Physics · 2004 · Shift 0

74 questions from this JEE Main paper

Electronic Devices3 questions Electromagnetic Waves2 questions Wave Optics2 questions Dual Nature of Radiation2 questions Atoms and Nuclei2 questions Magnetics4 questions Electrostatics4 questions Current Electricity9 questions Heat and Thermodynamics6 questions Magnetic Properties of Matter3 questions Alternating Current3 questions Electromagnetic Induction3 questions Geometrical Optics2 questions Properties of Matter3 questions Work Power and Energy5 questions Center of Mass1 questions Rotational Motion2 questions Gravitation4 questions Simple Harmonic Motion4 questions Waves1 questions Laws of Motion2 questions Units and Measurements1 questions Motion in A Straight Line2 questions Vector Algebra1 questions Motion in A Plane2 questions Circular Motion1 questions

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, $R$ 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