Physics Questions

Q:

The repeated reflection that results in persistence of sound is called

A) echo B) reflection
C) rarefaction D) reverberation
 
Answer & Explanation Answer: D) reverberation

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Q:

Sound is a

A) Electromagnetic wave B) Surface wave
C) Mechanical wave D) Tidal wave
 
Answer & Explanation Answer: C) Mechanical wave

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Q:

Definition of Force can be stated from:

A) Newton's second law of motion B) Newton's first law of motion
C) Newton's third law of motion D) Newton's law of gravitation
 
Answer & Explanation Answer: D) Newton's law of gravitation

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Q:

If the frequency of a sound wave of given velocity is increased , how will it affect its wavelength?

A) Its wavelength will increase B) The wavelength will not be affected
C) Its wave length will decrease D) Wavelength will keep increasing and decreasing alternately
 
Answer & Explanation Answer: C) Its wave length will decrease

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Q:

What does the symbol R in electricity stand for ?

A) Resistance B) Resonance
C) Refraction D) Rarefaction
 
Answer & Explanation Answer: A) Resistance

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Q:

Mirages are formed primarily due to ___ of light.

A) Reflection B) Diffusion
C) Refraction D) Scattering
 
Answer & Explanation Answer: C) Refraction

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Q:

What happens to the Potential and Kinetic energies of a body as it falls down from a height?

A) Its Potential energy decreases while its Kinetic energy increases B) There is no change in its Potential or Kinetic energy
C) Its Potential and Kinetic energies decrease D) Its Potential energy increases while its Kinetic energy decreases
 
Answer & Explanation Answer: A) Its Potential energy decreases while its Kinetic energy increases

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Q:

A charge of 2 C passes from one point to the other in a circuit. If the potential difference between the two points is 5 V, the amount of work done is

A) 5 J B) 10 J
C) 2.5 J D) 0.4 J
 
Answer & Explanation Answer: B) 10 J

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