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Physics Past Questions and Answers

Jamb Physics Questions

Question 26:

A radioactive isotope has a decay constant of 10^-6s^-1.
Calculate its half - life?

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A 5.93 x 10⁶s
B 6.93 x 10⁷s
C 6.93 x 10⁹s
D 5.93 x 10⁷s

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Question 27:

Which of the following waves is both transverse and mechanical?

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A Water waves
B Radio waves
C Sound waves
D X-rays

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Question 28:

Calculate the temperature of 6 moles of an ideal gas at a pressure of 7.6 x 10⁶Nm^-2 with a volume of 10^-3m³.
[R = 8.3jmol^-1K^-1]

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A 201^oC
B 126^oC
C 153^oC
D 185^oC

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Question 29:

The relative density of a liquid is the ratio of the

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A Mass of water to the mass of an equal volume of liquid
B Upthrust in the liquid to the upthrust in water
C Density of water to the density of the liquid
D Upthrust in water to the upthrust in the liquid

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Question 30:

What will happen to the pressure of a gas if its temperature is reduced to -273^oC?

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A It will decrease
B It will drop to zero
C It will increase
D It will remain constant

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