Top 1000+ Solved Physics MCQ Questions Answer
Q. Fog is an example of –
a. Gas dispersed in has
b. Liquid dispersed in gas
c. Solid dispersed in gas
d. Solid dispersed in liquid
Q. Electrostatic precipitator is used to control —
a. Air pollution
b. Water pollution
c. Solid waste
d. Noise pollution
Q. The time period of a second’s pendulum is –
a. 1 second
b. 2 seconds
c. 0.5 second
d. 1.5 seconds
Q. Metals are good conductors of electricity because –
a. they contain free electrons
b. the atoms are lightly packed
c. they have high melting point
d. All of the above
Q. Formation of shadows can be explained by -
a. rectilinear propagation of light
b. reflection
c. refraction
d. total internal reflection
Q. The absolute zero is a temperature at which -
a. Molecular motion in a gas would cease
b. Water freezes
c. All gases become liquid
d. All gases become solid
Q. An aircraft can perform aerobatic manoeuvres in a vertical loop because of-
a. gravity
b. centripetal force
c. weight
d. centrifugal force
Q. A photostat machine works on –
a. electromagnetic image making
b. electrostatic image making
c. magnetic image making
d. thermal image making
Q. If a copper wire is increased to double its length, its resistance will become –
a. four times
b. one-fourth
c. double
d. half
Q. In a diesel engine the high temperature needed to ignite the fuel is achieved by –
a. using heat from exhaust
b. the battery
c. compressing air in the cylinders
d. an electrical spark
Q. Which of the following physical quantities changes or tends to change the state of rest or of uniform motion of a body in a straight line?
a. Momentum
b. Mass
c. Force
d. Inertia
Q. Which of the following in the correct device that converts thermal energy into electrical energy?
a. constant volume gas thermometer
b. liquid-in-glass thermometer
c. thermopile
d. none of these
Q. To measure the speed of an approaching car a police officer shines –
a. light waves on it
b. microwaves on it
c. radio waves on it
d. ultra high frequency waves on it