Physics Questions

Q:

An atom bomb based upon the principal of ________

A) Nuclear fission B) Nuclear fussion
C) Controlled chain reaction D) None of these
 
Answer & Explanation Answer: A) Nuclear fission

Explanation:
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Q:

When a ray of light is  refracted by a prism such that the angle of deviation is minimum then

A) the angle of emergence is equal to the angle of incidence B) the angle of emergence is greater than the angle of incidence
C) the angle of emergence is smaller than the angle of incidence D) the sum of the angle of incidence and the angle of emergence is equal to 90 degrees
 
Answer & Explanation Answer: A) the angle of emergence is equal to the angle of incidence

Explanation:
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Q:

Unresolved dissonance is a characteristic of

Answer

When the tension is unresolved, we have unresolved dissonance. Unresolved dissonance is a characteristic of the baroque music.


The general characteristics of Baroque music is movement, energy, and tension.

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Q:

Two bulbs are fitted in a room in the domestic electric installation. One of them glows brighter than the other. Then

A) the brighter bulb has smaller resistance B) the brighter bulb has larger resistance
C) both the bulbs have the same resistance D) none of these
 
Answer & Explanation Answer: A) the brighter bulb has smaller resistance

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Q:

Hot water is poured simultaneously in four metallic tumblers painted outside with different paints. After some time the water will be found to have cooled most in the tumbler painted.

A) rough white B) rough black
C) shining white D) shining black
 
Answer & Explanation Answer: B) rough black

Explanation:

Black surfaces are good emitters of heat. If the black surface is rough too, the emitting will be better. Shinning surfaces reflect black radiation . So if the black surface is also shining the effectiveness of emitting heat is lessened.

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Q:

Distance of stars are measured in

A) Galactic unit B) seller mile
C) Cosmic Kilometre D) Light year
 
Answer & Explanation Answer: D) Light year

Explanation:
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Q:

Which of these is not a simple machine?

A) a pair of scissors B) a lever
C) a ramp D) the pulley
 
Answer & Explanation Answer: A) a pair of scissors

Explanation:

Any of the basic mechanical devices for applying a force are called simple machines.

There are 6 basic simple machines; the lever, the wheel and axle, the inclined plane, the wedge, the pulley, and the screw. Several of these simple machines are related to each other. But, each has a specific purpose in the world of doing work.

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Q:

Rate of doing work is called

A) Capacity B) Energy
C) Power D) Current
 
Answer & Explanation Answer: C) Power

Explanation:

The Rate of doing work or rate of transfer of energy is called Power.

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