383 questions asked across 19 exam years, newest first
A new unit () of length is chosen such that it is equal to the speed of light in vacuum. What is the distance between Venus and Earth in terms of units if light takes 6 min. 40 s to cover this distance ?
Answer: B
A gas balloon is going up with a constant velocity of . When this balloon reached a height of , a stone is dropped from it and balloon keeps moving up with the same velocity. The height of the balloon when the stone hits the ground is ____ . (Take )
Answer: D

Answer: A
Two masses of and are accelerated from an initial speed of and , respectively. The distances traversed by the masses in the second are and , respectively. The ratio of their momenta after is . The value of is ____ .
Answer: 9
A point light source emits E.M. waves in free space. A detector, placed at a distance of , measures the intensity as . The detector is now shifted to another location on the same spherical surface ensuring the angle between original location and new location as . The measured intensity at new location will be ____.
Answer: B
A small cube of side is placed at the centre of a circular loop of radius carrying a current of . The magnetic energy stored inside the cube is . The value of is ____. (, )
Answer: A
If of an ideal monoatomic gas at temperature , is mixed with of another ideal monoatomic gas at temperature then the temperature of mixture is :
Answer: D
When one moves from a point below the earth's surface to a point above the earth's surface. The change in is approximately . The value of is ____. (Take radius of the earth .)
Answer: B

Answer: A

Answer: B
Two cars and are moving in the same direction along a straight line with speeds and , respectively such that car is moving ahead of car . A person in car throws a stone with a speed so that it hits the car with a speed of . The value of is ____ .
Answer: C
At , a body of mass starts moving under the influence of a force . After its position is . The ratio is ____.
Answer: D
The height in terms of radius of the earth (), at which the acceleration due to gravity becomes , where is acceleration due to gravity on earth's surface, is ____.
Answer: C
A water spray gun is attached to a hose of cross sectional area . The gun comprises of 10 perforations each of cross sectional area of . If the water flows in the hose with the speed of , calculate the speed at which the water flows out from each perforation. (Neglect any edge effects)
Answer: B
A gun mounted on the ground fires bullets in all directions with same speed. The farthest distance the bullets could reach is . The speed of the bullets from the gun is ____ . (take )
Answer: 8
The velocity of a particle is given as . The magnitude of acceleration at point is ____ .
Answer: B
A spherical ball of mass falls from a height of and is brought to rest after penetrating into sand. The average force exerted by sand on the ball is ____ . (Take )
Answer: B
The equation of motion of a particle is given by . The particle will come to rest at time and it will have zero acceleration at time . The and respectively are ____.
Answer: A





Answer: D

Answer: B
Water drops fall from a tap on the floor, below, at regular intervals of time, the first drop strikes the floor when the sixth drop begins to fall. The height at which the fourth drop will be from ground, at the instant when the first drop strikes the ground is ____ . ()
Answer: C
Which one of the following is not a measurable quantity?
Answer: D
When the position vector changes sign as , which one of the following vector will not flip under sign change?
Answer: D
A particle starts moving from time and its coordinate is given as A. The particle returns to its original position (origin) 0.866 units later B. The particle is 1 unit away from origin at its turning point C. Acceleration of the particle is non-negative D. The particle is 0.5 units away from origin at its turning point E. Particle never turns back as acceleration is non-negative Choose the correct answer from the options given below :
Answer: B
Two electrons are moving in orbits of two hydrogen like atoms with speeds and respectively. If the radii of these orbits are nearly same then the possible order of energy states are ____ respectively.
Answer: D