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Q:

When we see an object, the image formed on the retina is ________

A) Real and inverted B) Real and erect
C) Virtual and erect D) Virtual and inverted
 
Answer & Explanation Answer: A) Real and inverted

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Q:

Find the current (in A) when a charge of 500 Coulomb flows in 25 seconds.

A) 12500 B) 20
C) 40 D) 6250
 
Answer & Explanation Answer: B) 20

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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

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Q:

Creating realistic sounds in animation is called

A) Geisler B) Foley
C) Doppler D) Echoe
 
Answer & Explanation Answer: B) Foley

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Q:

In the gamma decay of a nucleus

A) the mass number of the nucleus changes whereas its atomic number does not change B) the mass number of the nucleus does not change whereas its atomic number changes
C) both the mass number and the atomic number of the nucleus change D) neither the mass number nor the atomic number of the nucleus changes
 
Answer & Explanation Answer: D) neither the mass number nor the atomic number of the nucleus changes

Explanation:

The emission of gamma rays does not alter the number of protons or neutrons in the nucleus but instead has the effect of moving the nucleus from a higher to a lower energy state (unstable to stable)

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Q:

If the power of a corrective lens is +2.0 D, then it is a

A) convex lens B) concave lens
C) convex mirror D) concave mirror
 
Answer & Explanation Answer: A) convex lens

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Q:

Find the power of a convex lens if the image formed is at a distance of 20 cm from the lens when the object is placed on the other side of the lens at 25 cm from the optical centre?

A) 1 diopters B) -9 diopters
C) 9 diopters D) -1 diopters
 
Answer & Explanation Answer: C) 9 diopters

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Q:

What is the SI unit of pressure?

A) Newton B) Weber
C) Pascal D) Henry
 
Answer & Explanation Answer: C) Pascal

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