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Physics Past Questions and Answers

Jamb Physics Questions

Question 16:

What quantity of heat is required to convert 20 g of ice at 0 ºC to water at the same temperature? (Specific latent heat of ice = 336 Jg\(^{-1}\))

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A 7.06 x 10\(^{3}\)J
B 5.38 x 10\(^{3}\)J
C 6.72 x 10\(^{3}\)J
D 1.35 x 10\(^{3}\)J

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Question 17:

A train of mass 1600 kg attains a speed of 25 ms\(^{-1}\) in 20 seconds. The power developed in the engine is?

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A 2.5 KW
B 80 KW
C 25 KW
D 50 KW

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Question 18:

The main factor which affects the speed of sound wave is the?

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A Properties of the medium
B Amplitude of the sound wave
C Intensity of the sound wave
D Loudness of the sound wave

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Question 19:

A semiconductor is formed by?

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A Co-ordinate bonds
B Electrovalent bonds
C A substance free of bonds
D Covalent bonds

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Question 20:

One of the following is a scalar quantity?

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A Weight
B Momentum
C Potential energy
D Displacement

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