Physics-
General
Easy
Question
The reflecting surface is represented by the equation 
as shown in figure. A ray travelling horizontal becomes vertical after reflection. The co-ordinates of the point of incidence can be
- (1/2, 1)
- (1, 1/2)
- (1/2, 1/2)
- (1/2, -1)
The correct answer is: (1/2, -1)
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The rectangular box is the place of a spherical mirror. The point S is the position of an object and the point I is the position of its image. The height of the point S from the axis is two times that of point I. The horizontal separation between S and I is equal to 15 cm.
The rectangular box is the place of a spherical mirror. The point S is the position of an object and the point I is the position of its image. The height of the point S from the axis is two times that of point I. The horizontal separation between S and I is equal to 15 cm.
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If the unit of length be doubled then the numerical value of the universal gravitation constant G will become (with respect to present value)
If the unit of length be doubled then the numerical value of the universal gravitation constant G will become (with respect to present value)
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A point-like object of mass 2.0 kg moves along the x-axis with a velocity of + 4.0 m/s. A net horizontal force acting along the x-axis is applied to the object with the force-time profile shown. What is the total work that was done by the force?
A point-like object of mass 2.0 kg moves along the x-axis with a velocity of + 4.0 m/s. A net horizontal force acting along the x-axis is applied to the object with the force-time profile shown. What is the total work that was done by the force?
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Consider the cyclic process ABCA shown in figure, performed on a sample of 1 mole of an ideal gas. A total of 1000 J of heat is withdrawn from the sample in the process, the work done on the gas during part BC is 1830 J, the value of 
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A rubber ball bounces on the ground as shown. After each bounce, the ball reaches one-half the highest of the bounce before it. If the time the ball was in the air between the first and second bounce was 1 second, what would be the time between the second and third bounce?
A rubber ball bounces on the ground as shown. After each bounce, the ball reaches one-half the highest of the bounce before it. If the time the ball was in the air between the first and second bounce was 1 second, what would be the time between the second and third bounce?
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The diagram shows a uniformly charged hemisphere of radius R. It has volume charge density r. If the electric field at a point 2R distance above its center is E then what is the electric field at the point which is 2R below its center?
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The field line to the right is a field line of the electric field, then its representation can be
The field line to the right is a field line of the electric field, then its representation can be
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In frame I, two identical conducting spheres, A and B, carry equal amounts of excess charge that have the same sign. The spheres are separated by a distance d; and sphere A exerts an electrostatic force on sphere B which has a magnitude F. A third sphere, C, which is handled only by an insulated rod, is introduced in frame II. Sphere C is identical to A and B except that it is initially uncharged. Sphere C is touched first to sphere A, in frame II, and then to sphere B, in frame III, and is finally removed in frame IV.
Determine the magnitude of the electrostatic force that sphere A exerts on sphere B in frame IV
In frame I, two identical conducting spheres, A and B, carry equal amounts of excess charge that have the same sign. The spheres are separated by a distance d; and sphere A exerts an electrostatic force on sphere B which has a magnitude F. A third sphere, C, which is handled only by an insulated rod, is introduced in frame II. Sphere C is identical to A and B except that it is initially uncharged. Sphere C is touched first to sphere A, in frame II, and then to sphere B, in frame III, and is finally removed in frame IV.
Determine the magnitude of the electrostatic force that sphere A exerts on sphere B in frame IV
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For the biprism experiment shown in the figure, the fringe width increases when
For the biprism experiment shown in the figure, the fringe width increases when
physics-General
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In a Young's double–slit experiment, if the slits are of unequal width,
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Which of the following is the equation of a spherical wave
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are two coherent sources of sound having no initial phase difference. The velocity of sound is 330 m/s. No minima will be formed on the line passing through 
and perpendicular to the line joining 
, if the frequency of both the sources is:
are two coherent sources of sound having no initial phase difference. The velocity of sound is 330 m/s. No minima will be formed on the line passing through and perpendicular to the line joining , if the frequency of both the sources is:
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A string consists of two parts attached at x = 0. The right part of the string (x > 0) has mass mr per unit length and the left part of the string (x < 0) has mass 
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A string consists of two parts attached at x = 0. The right part of the string (x > 0) has mass mr per unit length and the left part of the string (x < 0) has mass per unit length. The string tension is T. If a wave of unit amplitude travels along the left part of the string, as shown in the figure, what is the amplitude of the wave that is transmitted to the right part of the string?
physics-General
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Two graphs of the same harmonic wave are shown below. The graph (1) on the left shows the displacement of wave y, as a function of position x for a given instant of time. The graph (2) on the right shows the displacement of wave as a function ot time 't' for a given position. The speed of the wave is
Two graphs of the same harmonic wave are shown below. The graph (1) on the left shows the displacement of wave y, as a function of position x for a given instant of time. The graph (2) on the right shows the displacement of wave as a function ot time 't' for a given position. The speed of the wave is
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The prong of a electrically operated tuning fork is connected to a long string of 
and tension 25 N. The maximum velocity of the prong is 1 cm/s, then the average power needed to drive the prong is:
The prong of a electrically operated tuning fork is connected to a long string of and tension 25 N. The maximum velocity of the prong is 1 cm/s, then the average power needed to drive the prong is:
physics-General
