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Practice Test - Physics 13
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Question 1
The potential energy of a 1 kg particle free to move along the positive x-axis is given by
.
The total mechanical energy of the particle is 2 J. Then, the maximum speed (in m/s) is
Question 2
Three sound waves of equal amplitudes have frequencies 
. They superpose to give beats. The number of beats produced per second will be
. They superpose to give beats. The number of beats produced per second will beQuestion 3
An initially parallel cylindrical beam travels in a medium of refractive index
, where μ0 and μ2 are positive constants and I is the intensity of the light beam. The intensity of the beam is decreasing with increasing radius. The initial shape of the wavefront of the beam is
, where μ0 and μ2 are positive constants and I is the intensity of the light beam. The intensity of the beam is decreasing with increasing radius. The initial shape of the wavefront of the beam isQuestion 4
The work done for the cycle shown in given figure, will be
Question 5
n moles of ideal monoatomic gas undergoes a process in which the temperature changes with volume as T = KV2. If the temperature of the gas changes from T0 to 4T0 then
Question 6
Distance of the center of mass of a solid uniform cone from its vertex is z0. If the radius of its base is R an its height is h then z0 is equal to
Question 7
A piece of copper and another of germanium are cooled from room temperature to 77 K, the resistance of
Question 8
A thin convex lens made from crown glass 
has focal length f. When it is measured in two different liquids having refractive indices 
and 
, it has the focal lengths f1 and f2 respectively. The correct relation between the focal lengths is :
has focal length f. When it is measured in two different liquids having refractive indices and , it has the focal lengths f1 and f2 respectively. The correct relation between the focal lengths is :Question 9
Two particles are executing simple harmonic motion of the same amplitude A and frequency ω along the x–axis. Their mean position is separated by distance X0 (X0 > A). If the maximum separation between them is (X0 + A), the phase difference between their motion is
Question 10
A long straight wire of radius a carries a steady current i. The current is uniformly distributed across its cross-section. The ratio of the magnetic field at 
and 2a is
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Mar 25JEE & BITSAT
