Top 1000+ Solved Physics MCQ Questions Answer
Q. What is the objective of the Kyoto Protocol?
a. To abolish child labour
b. To eliminate nuclear weapons
c. To increase ground water levels
d. To reduce greenhouse gases
Q. Rainbow is formed due to –
a. refraction and dispersion
b. scattering and refraction
c. diffraction and refraction
d. refraction and reflection
Q. Water is used in a hot water bag because –
a. It is easily available
b. It has high specific gravity
c. It has high specific heat
d. It is a liquid substance
Q. A fountain pen works on the principle of
a. Flow of liquids from higher to lower potential
b. Capillary action
c. Bernoulli's principle
d. Viscosity of liquids
Q. The fundamental scientific principle in the operation of battery is –
a. acid-base interaction
b. dialysis
c. dissociation of electrolytes
d. oxidation-reduction
Q. Velocity of sound in air does not change with the change of –
a. Temperature of air
b. Pressure of air
c. Moisture content in air
d. Wind in the direction of propagation of sound
Q. The stability of a pond ecosystem depends on -
a. micro-organisms and fishes
b. micro-organisms and zoo planktons
c. fishes and reptiles
d. producers and consumers
Q. Before X-ray examination (coloured X- ray) of the stomach, patients are given suitable salt of barium because.
a. barium is a good absorber of X-rays and helps stomach to appear clearly
b. barium salts are white in colour and this helps stomach to appear clearly
c. barium allows X-rays to pass through the stomach
d. barium salts are easily available
Q. Convex mirrors are used as a rear view mirror in motor cycles because
a. it forms real image
b. it forms erect (upright) image
c. it forms smaller image as compared with object
d. All of the above
Q. Railway tracks are banked on curves so that –
a. Necessary centrifugal force may be obtained from the horizontal component of the weight of the train
b. No frictional force may be produced between the tracks and the wheels of the train
c. Necessary centripetal force may be obtained from the horizontal component of the weight of the train
d. The train may not fall down inwards
Q. What is the range of mercury thermometer?
a. 0 degree Celsius to 350 degree Celsius
b. -10 degree Celsius to 350 degree Celsius
c. -20 degree Celsius to 350 degree Celsius
d. -30 degree Celsius to 350 degree Celsius
Q. The width of depletion layer of a P-N junction –
a. decreases with light doping
b. increases with heavy doping
c. is independent of applied voltage
d. is increased under reverse bias
Q. Ventilators are provided near the ceiling of the room because –
a. the exhaled warmer air rises up and goes out
b. these provide cross ventilation in the room
c. these provide some sunlight in the room
d. these do not look nice in the lower part
Q. What is a neuron?
a. Basic unit of energy
b. Particle released during radioactivity
c. The anti-particle of neutron
d. Basle unit of nervous system
Q. Which of the following is not caused by atmospheric refraction of light?
a. Sun appearing red at sunset
b. Twinkling of stars at night
c. Sun appearing higher in the sky than it actually is
d. Sun becoming visible two or three minutes before actual sunrise