Top 1000+ Solved Physics MCQ Questions Answer
Q. Rain drops fall from great height. Which among the following statements is true regarding it?
a. they fall with that ultimate velocity, which are different for different droplets
b. they fall with same ultimate velocity
c. their velocity increases and they fall with different velocity on the earth
d. their velocity increases and they fall with same velocity on the earth
Q. Which of the following occurred first?
a. Albert Einstein propounded the General Theory of Relativity
b. Max Planck unveiled the Quantum Theory
c. Guglielmo Marconi sent out the first wireless signals
d. Wright Brothers successfully flew an aircraft
Q. Why does bleeding occur through the nose in high mountainous regions?
a. The pressure of blood in capillaries is greater than the outside pressure
b. The pressure at high altitudes is greater than that on the plains
c. The blood pressure of a person increases at high altitudes
d. The blood pressure fluctuates and finally decreases drastically
Q. Pipelines in cold countries often burst in winter, because –
a. Water freezes and expands in its volume
b. Temperature of ice is less than that of water
c. Pipelines contract in their volume
d. Pipelines expand due to freezing
Q. The modulus of rigidity is the ratio of
a. Longitudinal stress to longitudinal strain
b. Volume stress to volume strain
c. Shearing stress to shearing strain
d. Tensile stress to tensile strain
Q. In heating frozen foods in sealed pouches in microwaves, why do you first poke holes in the pouch?
a. To prevent the steam pres-sure from bursting open the pouch
b. To allow the heat to get into the food through the hole
c. To allow the microwaves to get into the food through the holes
d. To allow the aroma of the food to come out through the holes
Q. A sphere rolls down on two inclined planes of different angles but same height, it does so –
a. in the same time
b. with the same speed
c. in the same time with the same speed
d. in the same time with the same kinetic energy
Q. During hot weather, the fan produces a feeling of comfort. This is because –
a. fan supplies cool air
b. fan cools the air
c. our perspiration evaporates rapidly
d. conductivity of air increases
Q. Stars appears to move from east to west because -
a. all stars move from east to west
b. the earth rotates from west to east
c. the earth rotates from east to west
d. the background of the stars moves from west to east
Q. An egg sinks in soft water but floats in a concentrated solution of salt because –
a. Egg absorbs salt from the solution and expands
b. Albumin dissolves in salt solution and egg becomes lighter
c. The density of salt solution exceeds the density of eggs
d. Water has high surface tension
Q. A hydrogen balloon floats because of –
a. Air pressure decreases with decrease in height
b. Air pressure decreases with decrease in weight
c. Weight of the balloon is less than the weight of air displaced by it
d. The pressure inside the balloon is more than the pressure outside it
Q. The term ‘equinox’ means –
a. The path which the Earth takes around the Sun
b. The axis of the Earth around which it rotates
c. When the day and night are of equal duration
d. The time when the Sun seems to be going round and round in the sky in the Arctic but does not go below the horizon
Q. After long periods of use, a grey spot develops on the inside of a bulb. This is because –
a. the tungsten filament evaporates and collects there
b. the heat of the bulb scorches the glass at the top
c. dust inside the bulb condenses on the top
d. glass undergoes a change due to the heat
Q. The blue colour of water in the sea is due to –
a. absorption of other colours except blue by water molecules
b. scattering of blue light by water molecules
c. reflection of blue light by impurities in sea water
d. reflection of blue sky by sea water
Q. Why Earth is called the blue planet?
a. Because of two-thirds surface covered by water
b. Because of water laden clouds in the atmosphere
c. Because of pollution in the atmosphere
d. None of these