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Q:

A standing wave occurs when

A) a wave reflects upon itself B) the amplitude of a wave exceeds its wavelength
C) two waves overlap D) the speed of the wave is zero or near zero
 
Answer & Explanation Answer: A) a wave reflects upon itself

Explanation:

A standing wave also known as a stationary wave, is a wave in which its peaks or any other point on the wave do not move spatially.

This phenomenon can occur because the medium is moving in the opposite direction to the wave, or it can arise in a stationary medium as a result of interference between two waves traveling in opposite directions. The most common cause of standing waves is the phenomenon of resonance, in which standing waves occur inside a resonator due to interference between waves reflected back and forth at the resonator's resonant frequency.

 

Hence, standing wave occurs when a wave reflects upon itself.

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Q:

In 1934 Mahatma Gandhi withdrew from active politics and even resigned his membership of the Congress because

A) of the failure of the Civil Disobedience Movement B) the political climate of India was unsuitable for any political movement
C) he wanted to devote himself fully to constructive programme and Harijam welfare D) of his opposition to the desire of congressmen to enter legislatures under the Government of India Act of 1935
 
Answer & Explanation Answer: C) he wanted to devote himself fully to constructive programme and Harijam welfare

Explanation:
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Q:

Improve the bracketed part of the sentence.

The teacher said, "It is time that your daughter (has learned) how to write."

A) learned B) had learnt
C) learnt D) no improvement
 
Answer & Explanation Answer: C) learnt

Explanation:
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Q:

In a Cinema hall, the distance between the projector and the screen is increased by 2%. Then the intensity of illumination on the screen is 

A) decreased by 2% B) decreased by 4%
C) increased by 2% D) increased by 4%
 
Answer & Explanation Answer: B) decreased by 4%

Explanation:
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Q:

Unit of solid angle is

A) degree B) radian
C) steradian D) radian second
 
Answer & Explanation Answer: C) steradian

Explanation:
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Q:

Prime Minister of India is de-facto head of which of the following bodies?

I. NITI Aayog

II. National Integration Council

III. Indian Board of Wildlife

A) Only I B) Only II
C) Both II and III   D) All I, II and III
 
Answer & Explanation Answer: D) All I, II and III

Explanation:
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Q:

Select the antonym of

to spurn

A) to accept B) to flout
C) to scorn D) to rebuff
 
Answer & Explanation Answer: A) to accept

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Q:

The stupa site which is not connected with any incident of lord Buddha's life is

A) Sarnath B) Bodh Gaya
C) Sanchi D) Kushinagar
 
Answer & Explanation Answer: C) Sanchi

Explanation:
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