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General
Easy
Question
The minimum value of mass m required to lift the load M shown in figure is
The correct answer is:
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One end of a light inextensible string is attached to a ceiling. The string passes under a smooth light pulley carrying a weight C and then over a fixed smooth light pulley. To the free end of the string is attached a light scale pan in which two weights A and B are placed with A on top of B as shown. The portions of the string not in contact with the pulleys are vertical. Each of the weights A and B has a mass M and the weight C has a mass 5M. If the system is released from rest
One end of a light inextensible string is attached to a ceiling. The string passes under a smooth light pulley carrying a weight C and then over a fixed smooth light pulley. To the free end of the string is attached a light scale pan in which two weights A and B are placed with A on top of B as shown. The portions of the string not in contact with the pulleys are vertical. Each of the weights A and B has a mass M and the weight C has a mass 5M. If the system is released from rest
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A heavy spherical ball is constrained in a frame as in figure. The inclined surface is smooth. The maximum acceleration with which the frame can move without causing the ball to leave the frame:
A heavy spherical ball is constrained in a frame as in figure. The inclined surface is smooth. The maximum acceleration with which the frame can move without causing the ball to leave the frame:
physics-General
physics-
A string is wrapped round a log of wood and it is pulled with a force F as shown in the figure Choose the correct statement(s)
I Tension T in the string decreases with increase in q
A string is wrapped round a log of wood and it is pulled with a force F as shown in the figure Choose the correct statement(s)
I Tension T in the string decreases with increase in q
physics-General
physics-
A child is swinging a ball of mass M around on a light spring which has spring constant k. The ball describes a horizontal circle a distance h above the floor. The stretched spring has a length l and makes an angle q with the vertical as shown below. The acceleration due to gravity is g. Neglect air resistance.
A child is swinging a ball of mass M around on a light spring which has spring constant k. The ball describes a horizontal circle a distance h above the floor. The stretched spring has a length l and makes an angle q with the vertical as shown below. The acceleration due to gravity is g. Neglect air resistance.
physics-General
physics-
Slider block A move to the left with a constant velocity of 6 m/s. Determine
Slider block A move to the left with a constant velocity of 6 m/s. Determine
physics-General
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An ideal monoatomic gas is carried around the cycle ABCDA as shown in the figure. The efficiency of the gas cycle is :
An ideal monoatomic gas is carried around the cycle ABCDA as shown in the figure. The efficiency of the gas cycle is :
physics-General
physics-
A body of mass m starts sliding down a movable inclined plane of mass 2m at t = 0, assuming friction is absent everywhere the kinetic energy of 2m as a function of time is (m remains on 2m) best represented by
A body of mass m starts sliding down a movable inclined plane of mass 2m at t = 0, assuming friction is absent everywhere the kinetic energy of 2m as a function of time is (m remains on 2m) best represented by
physics-General
physics-
In the figure shown, A & B are free to move. All the surfaces are smooth. 
In the figure shown, A & B are free to move. All the surfaces are smooth.
physics-General
physics-
The ends of two rods of different materials with their thermal conductivities, radii of cross sections and lengths all are in the ratio 1 : 2 are maintained at the same temperature difference. If the rate of flow of heat in the larger rod is 4 cal/sec, that in the shorter rod in cal/sec. will be
The ends of two rods of different materials with their thermal conductivities, radii of cross sections and lengths all are in the ratio 1 : 2 are maintained at the same temperature difference. If the rate of flow of heat in the larger rod is 4 cal/sec, that in the shorter rod in cal/sec. will be
physics-General
physics-
The diagram shows an equiconvex lens. What should be the condition on the refractive indices so that the lens become diverging?
The diagram shows an equiconvex lens. What should be the condition on the refractive indices so that the lens become diverging?
physics-General
physics-
In the figure shown man is balanced by counter weight of same mass. He starts to climb the rope with an accelerator of 2 m/s2 w.r.t. rope. The time after which he reaches the pulley will be
In the figure shown man is balanced by counter weight of same mass. He starts to climb the rope with an accelerator of 2 m/s2 w.r.t. rope. The time after which he reaches the pulley will be
physics-General
physics-
An unknown mass, m1 , hangs from a massless string and descends with an acceleration g/2. The other end is attached to a mass m2 which slides on a frictionless horizontal table. The string goes over a uniform cylinder of mass 
and radius R (see figure). The cylinder rotates about a horizontal axis without friction and the string does not slip on the cylinder. Express your answers in parts b, c and d in terms of g, 
An unknown mass, m1 , hangs from a massless string and descends with an acceleration g/2. The other end is attached to a mass m2 which slides on a frictionless horizontal table. The string goes over a uniform cylinder of mass and radius R (see figure). The cylinder rotates about a horizontal axis without friction and the string does not slip on the cylinder. Express your answers in parts b, c and d in terms of g,
physics-General
physics-
A block of weight 9.8N is placed on a table. The table surface exerts an upward force of 10N on the block. Assume 
A block of weight 9.8N is placed on a table. The table surface exerts an upward force of 10N on the block. Assume
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physics-
The values of 
for final rays to be parallel to the principle axis are: (focal lengths of the lenses are written on the lenses)
The values of for final rays to be parallel to the principle axis are: (focal lengths of the lenses are written on the lenses)
physics-General
physics-
Two convex lenses of focal length f and 2f are arranged to have their foci at the same point as shown in the figure. A beam of parallel light of diameter 1 cm is incident into the first lens. The beam emerging from the second lens is
Two convex lenses of focal length f and 2f are arranged to have their foci at the same point as shown in the figure. A beam of parallel light of diameter 1 cm is incident into the first lens. The beam emerging from the second lens is
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