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Physics Past Questions and Answers

Jamb Physics Questions

Question 21:

As a positively charge rod is brought nearer to the top cap of a positively charged gold leaf electroscope, the divergence of the leaves will

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A Decrease to zero
B Steadily increase
C Decrease to zero and then increase
D Remain constant
E Increase to a maximum and then decrease

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Question 22:

Which of the following statements is NOT true of \(\gamma\)-rays?

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A \(\gamma\)-rays belong to the electromagnetic spectrum
B \(\gamma\)-rays do not carry an electron charge
C \(\gamma\)-rays obey the inverse cube law in air
D The thickness of aluminium which stops b-particule has a negligible effect on \(\gamma\)-radiation
E The difference between \(\gamma\)-rays and X-rays is that \(\gamma\)-rays originate from energy charges in the nuclei of atoms, while X-rays comes from energy charges associated with the electron structure of atoms

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Question 23:

A rocket burns 0.01kg of fuel each second and ejects it as a gas with a velocity of 5,000m/s. What force does the gas exert on the rocket?

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A 500,000N
B 500N
C 50N
D 5,000N
E 50,000N

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Question 24:

Which of the following statements is true of a body which is moving in a straight line with uniform acceleration? The velocity of the body

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A Is also uniform
B Must always be zero when the body stops accelerating
C Will increase with time in the direction of the acceleration
D Is equal to the quotient of distance travelled and time
E Is the product of the distance travelled and time

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Question 25:

A heater marked 50W will evaporate 0.005kg of boiling water in 50 seconds. The specific latent heat of vaporization of water in J/kg is

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A 5.0 x 10⁶
B 1.0 x 10⁶
C 2.5 x 10⁶
D 2.5 x 10⁵
E 5.0 x 10⁵

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