A. novas and supernovas
B. binaries
C. asteroids
D. quasars
✅ The correct answer is option B.
Physics MCQs
Rainbow is produced when sunlight fall on drops of rain. Which of the following physical phenomena are responsible for this?
A. I, II and III
B. I and II
C. II and III
D. I and III
✅ The correct answer is option C.
On a cold day when a room temperature is 15oC, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15oC, because
A. metals have higher thermal capacity than plastics
B. plastics have a lower density than metals
C. metals are good conductor of heat
D. plastics have a higher thermal conductivity than metals
✅ The correct answer is option C.
Natural radioactivity was discovered by
A. Marie Curie
B. Ernest Rutherfor
C. Henri Becquerel
D. Enrico Fermi
✅ The correct answer is option C.
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
✅ The correct answer is option B.
Large astronomical telescopes always use as objective
A. lens
B. mirror
C. combinations of lenses
D. None of the above
✅ The correct answer is option C.
Let a thin capillary tube be replaced with another tube of insufficient length then, we find water
A. will overflow
B. will not rise
C. depressed
D. change its meniscus
✅ The correct answer is option B.
Solar eclipse will take place when
A. the sun is between the moon and the earth
B. the earth is between the moon and the sun
C. the moon is between the sun and the earth
D. the moon does not lie on the line joining the sun and the earth
✅ The correct answer is option C.
ML2T-2 is the dimensional formula for
A. moment of inertia
B. pressure
C. elasticity
D. couple acting on a body
✅ The correct answer is option D.
One thousand microns is equal to
A. 10-3m
B. 10-6m
C. 10-9m
D. 10-12m
✅ The correct answer is option A.