Top 1000+ Solved Physics MCQ Questions Answer
Q. Radio telescopes are better than optical telescopes because -
a. they can detect faint galaxies which no optical telescope can
b. they can work even in cloudy conditions
c. they can work during the day and night
d. All of the above
Q. White clothes are cooler than black ones because they –
a. absorb all the light that reaches them
b. reflect all the light that reaches them
c. will not allow the light to penetrate
d. cool the sunlight completely
Q. Sound is heard over longer distances on rainy days because –
a. sound travels slowly in moist air
b. sound travels faster in moist air
c. moist air does not absorb sound
d. moist air absorbs sound
Q. Rectifiers are used to convert -
a. Direct current to Alternating current
b. Alternating current to Direct current
c. high voltage to low voltage
d. low voltage to high voltage
Q. A galvanometer can be converted to a voltmeter by connecting –
a. a high resistance in parallel
b. a high resistance in series
c. a low resistance in series
d. a low resistance in parallel
Q. Copper wires are generally used for electrical power transmission instead of iron wire because
a. copper is cheaper than iron
b. copper is lighter than iron
c. copper is a better conductor of electricity than iron
d. copper can take higher power than iron
Q. The natural environment refers to -
a. The living organisms and non-living objects or factors in an area undisturbed by human activity
b. The atmosphere in a forest
c. The plants and animals in a forest
d. The atmosphere of an area-a forest, lake or an ocean
Q. Rainbows are produced when sunlight
a. Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction
b. Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction and internal reflection.
c. Incident on raindrops hanging in the atmosphere is dispersed after suffering reflection.
d. None of the given statements is correct.
Q. The information of brilliant colors in a thin soap film is a consequence of the phenomena of -
a. Polarization and interference
b. Diffraction and dispersion
c. Multiple refraction and dispersion
d. Multiple reflection and interference
Q. Purpose of an optical filter is to –
a. reflect lights of different colours
b. dispense light into component colours
c. refract light of different colours
d. transmit or absorb light of different colours
Q. Why are covalent compounds poor conductors of electricity?
a. Due to the presence of charged particles.
b. Due to the absence of charged particles.
c. Due to the presence of a triple bond.
d. None of the above
Q. Which of the following is not correct?
a. Ammeter measures the strength of electric current.
b. Lactometer measures the relative density of milk.
c. Rain gauge measures rain fall
d. Hygrometer measures sound under water.
Q. Which one of the following processes is responsible for the glittering of air bubble rising through water?
a. Reflection of light
b. Refraction of light
c. Total internal reflection of light
d. Scattering of light
Q. Railway tracks are banked on curves so that :
a. the train may not fall down inwards.
b. the weight of the train may be reduced.
c. necessary centripetal force may be obtained from the horizontal component of the normal reaction due to track.
d. no frictional force may be produced between the wheels and the track.
Q. An electron microscope gives higher magnifications than an optical microscope because –
a. The velocity of electrons is smaller than that of light
b. The wavelength of electrons is smaller as compared to the wavelength of visible light
c. The electrons have more energy than the light particulars
d. The electron microscope uses more powerful lenses