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Physics Past Questions and Answers

Jamb Physics Questions

Question 76:

To keep a vehicle moving at a constant speed V requires power P from the engine. The force provided by the engine is

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A \(\frac{P}{v}\)
B (\(\frac{1}{2}\))V
C PV
D \(\frac{P}{V^2}\)

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Question 77:

Which of the following is the dimension of pressure

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A ML\(^{âˆ’1}\)T\(^{âˆ’2}\)
B MLT\(^{−2}\)
C ML\(^{2}\)T\(^{3}\)
D ML\(^{âˆ’3}\)

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Question 78:

Palm oil from a bottle flows out more easily after it has been heated because the

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A Molecules are given energy during the heating
B Friction between oil layers is reduced
C Oil molecules force each other out
D Adhesion between the oil molecules and those of the bottle is increased

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Question 79:

A ball of mass 5.0kg hits a smooth vertical wall normally with a speed of 2ms\(^{-1}\). Determine the magnitude of the resulting impulse

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A 20.0kgms\(^{-1}\)
B 10.0kgms\(^{-1}\)
C 5.0kgms\(^{-1}\)
D 2.5kgms\(^{-1}\)

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Question 80:

The efficiency of energy conversion on the energy flow through a hydroelectric power is?

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A \(\frac{E1}{E2}\)
B \(\frac{E3}{E2}\)
C \(\frac{E2}{E1}\)+ E2
D \(\frac{E2}{E3}\) + E1

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