Top 1000+ Solved Physics MCQ Questions Answer
Q. The density of a gas is maximum at –
a. Low temperature, low pressure
b. Low temperature, high pressure
c. High temperature, low pressure
d. High temperature, high pressure
Q. A person standing on a railway platform listens to the whistles of arriving and departing trains. The whistle heard is -
a. the same in both cases in all respects
b. of higher intensity when train arrives
c. of higher pitch when train arrives
d. of higher pitch when train departs
Q. The cause for the Tsunami, as deduced by the seismologists, is –
a. Gravitational pull of the moon
b. Low pressure trough in the ocean
c. Deformation of sea floor and vertical displacement of water
d. Sudden change in the monsoon wind
Q. Should cars have bumpers that collapse under impact?
a. Yes, since the offending car should get damaged and pay for the mistake
b. No, since it would be very expensive to get the car repaired
c. No, since the colliding car would then ram into the occupants and kill them
d. Yes, since they help to absorb the impact of a collision and keep the occupants safe
Q. Light houses are places with powerful lights to :
a. guide and resolve traffic jams in crowded metrocities during nights.
b. guide and help large crowds at religious gathering during nights.
c. indicate to the incoming warships, the location of a harbour during night.
d. guide and warn the ships coming from different directions in the ocean.
Q. A bird sitting on a high tension electric wire does not get electrocuted because –
a. it has high resistance
b. the body is earthed
c. it does not form a closed path for the flow of current
d. its feet are good insulators
Q. A vacuum cleaner works on the principle of pressure difference. On the moon it will –
a. work as efficiently as on the earth
b. not work at all
c. work with reduced efficiency
d. work with increased efficiency
Q. The propagation of sound waves in a gas involves –
a. Adiabatic compression and rarefaction
b. Isothermal compression and rarefaction
c. Isochoric compression and rarefaction
d. Isobaric compression and rarefaction
Q. When a body is taken from earth to moon –
a. Mass changes but weight remains same
b. Weight changes but mass remains same
c. Both weight and mass change
d. Both weight and mass re-main same
Q. Superconductors are those elements –
a. Whose conductivity is intermediate between metals and insulators
b. Whose resistance falls almost to zero at very low temperature
c. Which conduct electricity only at super-high temperature
d. Which conduct electricity only, at super-high temperatures
Q. Ail oil drop spreads over water because
a. oil is lighter than water
b. oil is more viscous
c. oil does not mix with water
d. surface tension of oil is much smaller than that of water
Q. The nature of .fuse wire is –
a. high resistance and low melting point.
b. high resistance and high melting point.
c. low resistance and high melting point.
d. low resistance and low melting point.
Q. In a railway track, two rails are joined end to end with a gap in between them because –
a. steel can be saved
b. accidents due to contraction in winter can be avoided
c. air-gaps are necessary for bearing the weight of running train
d. accidents due to expansion in summer can be avoide
Q. When a pall of water is swung in a vertical circle, the water does not fall out at the top of the loop when the speed is –
a. below a certain minimum value irrespective of amour of water In the pail
b. above a certain minimum value irrespective of amount of water in the pail
c. above a certain minimum value depending on amount of water in the pail
d. below a certain minimum value depending on amount of water in the pail
Q. Vehicle tyres are inflated properly –
a. to ensure smooth running.
b. to allow the vehicle to take more load.
c. to avoid skidding and to minimize friction
d. to go fast and save fuel.