Q:

What is the value of acceleration due to gravity at the centre of earth?

A) -1	B) 0
C) 1	D) Infinity

Answer & Explanation Answer: B) 0

Explanation:

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Q:

Sunspots appear dark because they are

A) hotter than the rest of the Sun's surface.	B) more magnetic than the rest of the Sun's surface.
C) cooler than the rest of the Sun's surface.	D) None of the above

Answer & Explanation Answer: C) cooler than the rest of the Sun's surface.

Explanation:

Sunspots are a magnetic phenomenon on the Sun.

The reason a sunspot appears dark is that they are cooler than the rest of the Sun's surface and also the gas inside the spot where the magnetic field is strongest is only emitting about 1/4 as much light as from the rest of the solar surface.

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Q:

The work done in one complete revolution of the moon around the earth is equal to

A) centripetal force x radius of the orbit of the moon	B) gravitational force x circumference of the orbit of the moon
C) gravitational force x diameter of the orbit of the moon	D) zero

Answer & Explanation Answer: D) zero

Explanation:

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Q:

If I is the current through a wire and e is the charge of an electron, then the number of electrons crossing in t seconds will be given by

A) e/It	B) It/e
C) Ie/t	D) Ite

Answer & Explanation Answer: B) It/e

Explanation:

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Q:

A sentence has been given in Active/Passive Voice. Out of the four given alternatives, select the one which best expresses the same sentence in Passive/Active Voice.

The fans invited the cricketer.

A) The cricketer was invited by the fans	B) The cricketer received an invitation by the fans
C) The cricketer is invited by the fans	D) The cricketer was invite by the fans

Answer & Explanation Answer: A) The cricketer was invited by the fans

Explanation:

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Q:

In the following question, a sentence has been given in Active/Passive voice. Out of four alternatives suggested, select the one, which best expressesthe same sentence in Passive/Active voice.

The cricket ball struck me on the head.

A) Struck me on the head the cricket ball	B) I was struck on the head by the cricket ball
C) I had been struck on the head by the cricket ball	D) I am striked on the head by the cricket ball

Answer & Explanation Answer: B) I was struck on the head by the cricket ball

Explanation:

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Q:

Calculate the distance (in cm) of the chord from the centre of the circle, if the chord of length 48 cm is drawn in the circle of radius 25 cm.

A) 7	B) 14
C) 49	D) 56

Answer & Explanation Answer: A) 7

Explanation:

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Q:

In the following question, select the missing number from the given series.

2, 5, 12, 27, ?

A) 53	B) 56
C) 57	D) 58

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