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Physics Past Questions and Answers

Jamb Physics Questions

Question 6:

Calculate the upthrust on an object of volume 50cm3 which is immersed in liquid of density 103kgm-3 [g = 10ms-2]

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A 0.8N
B 2.5N
C 0.5N
D 1.0N

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Question 7:

Under what conditions are cathode rays produced in a discharge tube?

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A High pressure and low voltage
B High pressure and high voltage
C Low pressure and low voltage
D Low pressure and high volatge

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Question 8:

Under which of the following conditions is workdone

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A A man supports a heavy food above his head with his hands
B A boy climbs onto a table
C A man pushes unto a table
D A woman holds a pot of water

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Question 9:

Calculate the specific latent heat of vaporization of steam of 1.13 x 106J of heat energy is required to convert 15kg of steam to water.

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A 7.53 x 105 Jkg\(^{-1}\)
B 7.53 x 10-2Jkg\(^{-1}\)
C \(7.53 \times 10^{4}\)Jkg\(^{-1}\)
D 7.53 x 10-3Jkg\(^{-1}\)

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Question 10:

A cell of internal resistance 2 Ï€ supplies current to a 6 Ï€ resistor. The efficiency of the cell is

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A 12.0%
B 25.0%
C 33.3%
D 75.0%

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