NEET Physics Gravitational Field Potential and Potential Energy MCQs Set A

Question. Where will it be profitable to purchase one kilogram sugar?
(a) None of these
(b) At 40° latitude
(c) At poles
(d) At 45° latitude

Answer: A

Question. Consider Earth to be a homogeneous sphere. Scientist A goes deep down in a mine and scientist B goes high up in a balloon. The gravitational field measured by
(a) each decreases at different rates
(b) each decreases at the same rate
(c) A goes on decreasing and that by B goes on increasin
(d) B goes on decreasing and that by A goes on increasing

Answer: A

Question. In some region, the gravitational field is zero. The gravitational potential in this region.
(a) must be constant
(b) must be zero
(c) must be variable
(d) cannot be zero

Answer: A

Question. In a gravitational field, at a point where the gravitational potential is zero
(a) the gravitational field is necessarily zero
(b) the gravitational field is not necesarily zero
(c) any value between one and infinite
(d) None of these

Answer: A

Question.  The potential energy of a rock, having mass m and rotating at a height of 3.2 × 10⁶ m from the earth surface, is
(a) – 0.67 mgR_e
(b) – 0.33 mgR_e
(c) – 6 mgR_e
(d) – 0.99 mgR_e

Answer: A

Question.  There are _______ gravitational lines of force inside a spherically symmetric shell.
(a) zero
(b) infinitely many
(c) varying number depending upon surface area
(d) varying number depending upon volume

Answer: A

Question.  Intensity of the gravitational field inside the hollow spherical shell is
(a) zero
(b) minimum
(c) variable
(d) maximum

Answer: A

Question.  Which of the following is always positive?
(a) Kinetic energy
(b) None of these
(c) Total energy of a satellite
(d) Potential energy of an object

Answer: A

Question.  Radius of moon is 1/4 times that of earth and mass is 1/81 times that of earth. The point at which gravitational field due to earth becomes equal and opposite to that of moon, is (Distance between centres of earth and moon is 60R, where R is radius of earth)
(a) 54 R from centre of earth
(b) 53 R from centre of earth
(c) 16 R from surface of moon
(d) 5.75 R from centre of moon

Answer: A

Question. A uniform spherical shell gradually shrinks maintaining its shape. The gravitational potential at the centre
(a) increases
(b) remains constant
(c) decreases
(d) cannot say

Answer: A