Top 1000+ Solved Physics MCQ Questions Answer
Q. A black body can absorb radiations of
a. lower wavelengths only
b. intermediate wavelengths only
c. higher wavelengths only
d. all wavelengths
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. When hot liquid is poured into a thick glass tumbler, it cracks because glass –
a. is a bad conductor of heat so only inner surface expands
b. has high temperature coefficient of expansion
c. has a very low specific heat
d. has low temperature coefficient of expansion
Q. Hydro-electric power is a:
a. non-renewable natural resource
b. a mixture of renewable and non-renewable natural resource
c. neither renewable nor non renewable resource
d. renewable natural resource
Q. The electric motor converts -
a. Electrical energy into mechanical energy
b. Mechanical energy into electrical energy
c. Electrical energy into light energy
d. None of these
Q. Burns caused by steam are much severe than those caused by boiling water because –
a. Steam pierces through the pores of body quickly
b. Steam has latent heat
c. Steam is gas and engulfs the body quickly
d. Temperature of steam is higher
Q. According to special theory of relativity the mass of a particle –
a. increases with increase in velocity with respect to an observer.
b. decreases with increase in velocity.
c. decreases with decrease in velocity.
d. is independent of its velocity.
Q. Vegetables are cooked in lesser time by adding a pinch of salt while cooking because
a. boiling point of water increases
b. latent heat of vaporization of water decreases
c. latent heat of vaporization of water increases
d. boiling point of water decreases
Q. A man standing at the top of a tower has two spheres A and B. He drops sphere A downwards and throws sphere B horizontally at the same time. Which of the following is correct?
a. Both the spheres will reach the ground simultaneously.
b. A will reach the ground first.
c. B will reach the ground first.
d. The question is incomplete because the masses of the spheres are not given.
Q. The wavelength at which the peak of intensity of blackbody radiation Occurs –
a. increases with increase in temperature
b. decreases with increase in temperature
c. is the same at all temperatures
d. does not follow any pattern as temperature changes
Q. A dynamo converts .
a. Mechanical energy into sound energy
b. Mechanical energy into electrical energy
c. Electrical energy into mechanical energy
d. None of these
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. What is the relation between wavelength, frequency and velocity?
a. velocity of wave = frequency * wavelength
b. velocity of wave = frequency/wavelength
c. velocity of wave = wavelength/frequency
d. None of above
Q. Ozone layer in the outer atmosphere helps us in –
a. reflecting radio waves and makes radio communication possible
b. regulating he temperature of atmosphere
c. absorbing cosmic ray particles
d. absorbing U-V radiations
Q. Stationary wave is formed by –
a. a transverse wave superposing a longitudinal wave
b. two waves of the same speed superposing
c. two waves of same frequency travelling in the same direction
d. two waves of same frequency travelling in the opposite direction