Top 1000+ Solved Physics MCQ Questions Answer
Q. We feel cool when we sit near the fan, this is because –
a. fan gives cool air.
b. an cools surrounding air.
c. air vapourises the sweat on our body.
d. we feel cool when air touches the body.
Q. The average kinetic energy of the molecules of an ideal gas is directly proportional to –
a. Velocity of Molecules
b. Mass of Molecules
c. Absolute temperature of the gas
d. Temperature of environment
Q. When heated from 0°C to 100°C volume of a given mass of water will –
a. Increase gradually
b. Decrease gradually
c. Increase and then will decrease
d. Decrease and then will Increase
Q. Clothes keep us warm in winter because they :
a. supply heat
b. do not radiate heat
c. prevent air from contacting the body
d. prevent the heat of the body from escaping
Q. In a refrigerator what produces the cooling?
a. The ice which deposits on the freezer
b. The sudden expansion of a compressed gas
c. The evaporation of a volatile liquid
d. None of these
Q. Microphone is a device which transforms the –
a. sound signal into current signal
b. current signal into sound signal
c. sound signal into light signal
d. light signal into sound signal
Q. Pressure Cooker cooks faster because
a. boiling point decreases with rise of pressure
b. it cooks the food at low pressure
c. higher temperature is attained for cooking
d. the material of the cooker is a good conductor
Q. What is a compound microscope?
a. A microscope that has one lens.
b. A microscope that has two sets of lenses : an occular lens and an eyepiece.
c. A microscope whose lenses are concave.
d. A microscope whose lenses are convex.
Q. The temperature of boiling water in a steam engine may be high because -
a. there are dissolved substances in water
b. there is low pressure inside the boiler
c. there is high pressure inside the boiler
d. the lire is at very high temperature
Q. The motion of a body around a circular path is an example of –
a. Uniform velocity, variable acceleration
b. Uniform speed, uniform velocity
c. Uniform speed, variable velocity
d. Uniform speed, variable acceleration
Q. A gas thermometer is more sensitive than a liquid thermometer because a gas:
a. is lighter than liquid
b. expands more than a liquid
c. is easy to obtain
d. does not change state easily
Q. Outside of cooking utensils are generally left black from below because –
a. it is difficult to clean daily.
b. black surface is a good conductor of heat.
c. black surface is a poor conductor of heat.
d. black surface is a good absorber of heat.
Q. X-rays region lies between –
a. Ultraviolet and visible region
b. Visible and infra-red region
c. Gamma-rays and ultraviolet region
d. Short radio waves and long radio waves
Q. A star appears twinkling in the sky because of –
a. scattering of light by atmosphere
b. reflection of light by atmosphere
c. refraction of light by atmosphere
d. diffraction of light by atmosphere
Q. Water pipes in hilly areas often burst on a cold frosty night, because –
a. The material of which pipes are made contracts due to cold and so breaks
b. Water in the pipes freezes and on freezing water expands, so pipes break
c. Frost makes the pipes rusty, so they break
d. None of these