Q:

Which one of the following statements is not correct?

A) The response of the ear to sound of increasing intensity is approximately logarithmic.	B) The sensitivity of the human ear does not vary with the frequency of the sound.
C) When two or more waves traverse the same medium, the displacement of any element of the medium is the algebraic sum of the displacements due to each wave.	D) Longitudinal waves can travel in all media-solids, liquids and gases.

Answer & Explanation Answer: B) The sensitivity of the human ear does not vary with the frequency of the sound.

Explanation:

The human ear can respond to minute pressure variations inthe air if they are in the audible frequency range, roughly 20 Hz -20 kHz. In fact, tests conducted show an increased sensitivity in the 3000 Hz range which is the optimal amplification frequency in the human ear. So, the sensitivity of the human ear varies with the frequency of the sound.

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Q:

The theory behind stars twinkling is that

A) The refractive index of the different layers of earth's atmosphere changes continuously, consequently the position of the star's image changes with time	B) The intensity of light emitted by them changes with time
C) The light from the star is scattered by the dust particles and air molecules in the earth's atmosphere	D) The distance of the stars from the earth changes with time

Answer & Explanation Answer: A) The refractive index of the different layers of earth's atmosphere changes continuously, consequently the position of the star's image changes with time

Explanation:

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Q:

Ornithophily is effected by

A) snails	B) bats
C) insects	D) birds

Answer & Explanation Answer: D) birds

Explanation:

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Q:

Which Indian State has the highest GDP?

A) Gujarat	B) Maharashtra
C) Karnataka	D) Andhra Pradesh

Answer & Explanation Answer: B) Maharashtra

Explanation:

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Q:

The Chairman of NITI Ayog is.....

A) Industry Minister	B) Prime Minister
C) Finance Minister	D) Commerce Minister

Answer & Explanation Answer: B) Prime Minister

Explanation:

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Q:

What is the full form of the Indian Political Party "NCP"?

A) Nationalist Congress Party	B) National Congress Party
C) National Communist Party	D) Nationalist Communist Party

Answer & Explanation Answer: A) Nationalist Congress Party

Explanation:

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Q:

Addition of suitable impurities into semiconductor, is called

A) Doping	B) Mixing
C) Forming	D) Diluting

Answer & Explanation Answer: A) Doping

Explanation:

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Q:

What is the old name of Singapore?

A) Temasek	B) Myanmar
C) Ceylon	D) Bohemia

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