Top 1000+ Solved Physics MCQ Questions Answer
Q. The wall of a dam is broader at the base
a. because streamlining is required
b. to withstand pressure that increases with depth
c. to withstand pressure that increases in a horizontal plane
d. to withstand pressure that is increased with atmospheric pressure
Q. A transformer –
a. converts DC to AC
b. is used to decrease or increase AC voltage
c. converts AC voltage to D.C. voltage
d. converts electrical energy into mechanical energy
Q. 'Mirage' is an example of –
a. refraction of light only
b. total internal, reflection of light only
c. refraction and total internal reflection of light
d. dispersion of light only
Q. The absolute zero is a temperature at which .
a. molecular motion in a gas would cease
b. water freezes
c. all gases become liquid
d. all gases become solid
Q. Surface tension in a liquid is due to :
a. Adhesive force between molecules
b. Cohesive force between molecules
c. Gravitational force between molecules
d. Electrical force between molecules
Q. When a vehicle passes, TV reception gets distorted. This is because –
a. metal reflects radiowaves
b. spark plug creates electromagnetic disturbances
c. vehicle pollution affects the performance of the TV components
d. modern vehicles use electro ignition system
Q. The snow on the mountains does NOT melt all at once when it is heated by the sum because:
a. It becomes very hard
b. It reflects most of the heat from the sum
c. it has a low specific heat capacity
d. it has a high latent heat of fusion
Q. The water from a hand pump is warm in winter because -
a. our body is cold in winter and the water appears to be warm
b. the temperature inside the Earth is higher than the atmospheric temperature
c. the pumping process causes friction which warms up the water
d. inside water comes out and absorbs heat from the environment
Q. ‘Mirage' is an example of -
a. Refraction of light only
b. Total internal reflection of light only
c. Refraction and total internal reflection of light
d. Dispersion of light only
Q. It is easier to carry two buckets of water in one hand each, than to carry only one in one hand because –
a. weights of buckets are balanced
b. centre of gravity falls within the body
c. centre of gravity and centre of equilibrium fall within the feet
d. resultant weight of buckets is zero
Q. Dynamo is a device for converting –
a. Heat energy into electrical energy
b. Mechanical energy into electrical energy
c. Magnetic energy into electrical energy
d. Chemical energy into electrical energy
Q. The magnifying power of an astronomical telescope can be decreased by –
a. decreasing the focal length of the eyepiece
b. increasing the focal length of the eyepiece
c. increasing the focal length of the objective
d. None of these
Q. Which of the following events occurred first?
a. Albert Einstein propounded the General Theory of Relativity
b. Max Planck unveiled the Quantum Theory
c. Marconi first transmitted a wireless signal
d. Madame Marie Curie be-came the first woman Nobel Prize winner
Q. The velocity of sound in air –
a. decreases with increase of temperature
b. increases with decrease of temperature
c. does not depend on temperature
d. decreases with decrease of temperature
Q. The sensation of weightlessness in a spacecraft in an orbit is due to the –
a. Absence of gravity outside
b. Acceleration in the orbit which is equal to the acceleration due to gravity outside
c. Presence of gravity outside but not inside the spacecraft
d. Fact that spacecraft in the orbit has no energy