Top 1000+ Solved Physics MCQ Questions Answer
Q. Why the needle of iron swims on water surface when it is kept gently?
a. It will remain under the water, when it will displace more water than its weight
b. the density of needle is less than that of water
c. due to surface tension
d. due to its shape
Q. In which of the following cases, kinetic energy is being used in performing work?
a. Paddling the bicycle to cover a distance
b. Driving a car to cover a distance
c. Wind mill grinding wheat grain
d. Rowing a boat in the lake
Q. The spoon dropped by an astronaut in a satellite will –
a. Fall to the floor
b. Remain stationary
c. Continue to follow the motion of the satellite
d. Move tangentially away
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. Which of the following options correctly explains the term heat budget?
a. It is a mode of transfer of heat through matter by molecular activity.
b. It is the balance between incoming and outgoing radiation.
c. It is the radiation from the earth in the form of long waves.
d. It is the amount of heat which the surface of earth receives from the sun.
Q. The purpose of choke in a fluorescent lamp is –
a. to increase the current flow
b. to decrease the current flow
c. to decrease the resistance
d. to decrease the voltage momentarily
Q. To prevent damage from lightning, lightning conductors are used on tall structures. The lightning conductor –
a. should be made of a good conductor but can be of any shape
b. should be in the form of a vertical rod
c. can be of any shape
d. should be made of a good conductor like copper with sharp-pointed edges
Q. Beta rays emitted by a radioactive material are –
a. The electrons orbiting around the nucleus
b. Charged particles emitted by nucleus
c. Neutral particles
d. Electromagnetic radiations
Q. What is the principle of a life Jacket'?
a. It provides oxygen to a drowning person
b. It increases the volume of the person to keep him afloat
c. It decreases the volume of the person to keep him afloat
d. The person can sit on it like a raft
Q. Steam at 100°C causes more severe burns than water at 100° C because –
a. steam has no specific heat capacity
b. steam has latent heat of vaporization
c. water has no specific heat capacity
d. water has latent heat of fusion
Q. Ice cubes are added to a glass of pure water and a glass of pure alcohol. The ice would be –
a. at a higher level in water
b. at a higher level in alcohol
c. at the same level in both
d. floating in alcohol and sinking in water
Q. Indicate the false statement about the resistance of a wire –
a. it depends on material of wire
b. it is directly proportional to the length of wire
c. it is directly proportional to the area of cross- section of wire
d. resistance of metallic wire increases with increase in temperature
Q. A metal ball and a rubber ball, both having the same mass, strike a wall normally with the same velocity. The rubber ball rebounds and the metal ball does not rebound. It can be concluded that –
a. The rubber ball suffers greater change in momentum
b. The metal ball suffers greater change in momentum
c. Both suffer the same change in momentum
d. The initial momentum of the rubber ball is greater than that of the metal ball
Q. In a conductor –
a. there is no conduction band
b. the forbidden energy gap is very wide
c. the forbidden energy gap is very narrow
d. the valence band and the conduction band overlap each other
Q. On a clean glass plate a drop of water spreads to form a thin layer whereas a drop of mercury remains almost spherical because
a. Mercury is a metal
b. Density of mercury is greater than that of water
c. Cohesion of mercury is greater than its adhesion with glass
d. Cohesion of water is greater than its adhesion with glass