Top 1000+ Solved Physics MCQ Questions Answer
Q. Refrigeration is a process which –
a. kills bacteria
b. slows down the bacterial growth
c. Inactivates the bacteria
d. Plasmolyses the bacteria
Q. The function of ball bearings in a wheel is –
a. to increase friction
b. to convert kinetic friction into rolling friction
c. to convert static friction into kinetic friction
d. just for convenience
Q. On a cold day when the room temperature is 15°C, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15°C, because –
a. metals have higher thermal capacity than plastics
b. plastics have a lower density than metals
c. metals are good conductors of heat
d. plastics have a higher thermal conductivity than metals
Q. The apparent weight of a person in a lift which is moving down with uniform acceleration is .
a. greater than the weight when the person is stationary
b. twice the weight when the person is stationary
c. less than the weight when the person is stationary
d. same as the weight when the person is stationary
Q. Air Quality Index is -
a. an air pollutant measuring machine
b. a measuring scale to show quality of air
c. used for measuring humidity level
d. used for forecasting rain
Q. If we want to calculate the pressure of a liquid at the bottom of a vessel, the quantity which is not required to determine it, is –
a. Height of the liquid column
b. Surface area of the bottom of the vessel
c. Density of the liquid
d. Acceleration due to gravity at the bottom of the vessel
Q. It is easy to burst a gas-filled balloon with a needle than with a nail. It is because –
a. nail is more longer than needle.
b. nail exerts more pressure than needle on the balloon.
c. needle exerts more pressure than nail on the balloon.
d. gas is reactive with the needle.
Q. For a body floating in water, the apparent weight is equal to -
a. Actual weight of the body
b. Zero
c. Weight of the body minus weight of the liquid
d. Weight of the body plus upward thrust
Q. The characteristic invalid for heat radiation is that it travels –
a. in a straight line
b. in all directions
c. with the speed of light
d. heating the medium through which it passes
Q. The method of magnetization is:
a. hammering a magnet
b. heating a magnet
c. passing direct current through it
d. passing alternating current through it
Q. Which among the following is false about work?
a. If displacement is zero, work is zero
b. Work done can be negative
c. It is a vector quantity
d. Its unit is Joule
Q. Which of the following is false?
a. Most carbon compounds are poor conductors of electricity.
b. The force of attraction between carbon molecules is not very strong.
c. The atomic number of carbon is 6.
d. The earth’s crust has about 2% carbon in the form of minerals.
Q. Two vectors are said to be equal if –
a. only their magnitudes are same
b. only their directions are same
c. both magnitude and direction are same
d. magnitudes are same but directions are opposite
Q. A real gas can act as an ideal gas in -
a. high pressure and low temperature
b. low pressure and high temperature
c. high pressure and high temperature
d. low pressure and low temperature
Q. The Dynamo converts –
a. Electrical Energy into Mechanical Energy
b. Mechanical Energy into Magnetic Energy
c. None of these
d. Mechanical Energy into Electrical Energy