61. If both temperature and volume of an ideal gas are doubled, the pressure:
A. Remains constant
B. Is also doubled
C. Increases by a factor of 4
D. Is diminished by a factor of 1/4
62. PV has dimension:
A. Power
B. Energy
C. Force
D. None of the above
63. Internal energy of a real gas depends upon:
A. Only on the temperature of the gas
B. Only on the volume of gas
C. Only on the pressure of gas
D. Size of molecules
64. Pressure exerted by a gas is:
A. Independent of the density of the gas
B. Inversely proportional to the density of the gas
C. Directly proportional to the square of the density of the gas
D. Directly proportional to the density of gas
65. On a cold morning, a metal surface will feel colder to touch than a wooden surface. This is because of:
A. Metals have high specific heat
B. Metals have high thermal conductivity
C. Metals have low specific heat
D. Metals have low thermal conductivity
66. A cycle tyre is burst, due to which air escapes out from it. This represents an:
A. Isothermal process
B. Isobaric process
C. Isochoric process
D. Adiabatic process
67. During adiabatic compression of a gas, the temperature of the gas:
A. Falls
B. Rises
C. Remains constant
D. Becomes zero
68. The unit of coefficient of friction is:
a) N
b) kg
c) µ
d) it has no unit
69. The centripetal acceleration for an object of mass 1 kg moving with 6 m/s in a circle of radius 3m is:
a) 18ms⁻²
b) 10ms⁻²
c) 12ms⁻²
d) 2ms⁻²
70. How many times the centripetal force will increase if the mass of a body moving with uniform speed in a circle is doubled?
a) Six times
b) Two times
c) Four times
d) Eight times
Admin