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Physics Past Questions and Answers

Jamb Physics Questions

Question 31:

All the heat generated in a 5 ohms resistor by 2A flowing for 30 seconds is used to evaporate 5g of a liquid at its boiling point. Which of the following is the correct value of the specific latent heat of the liquid?

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A 120J
B 60Jg^-1
C 120Jg^-1
D 1500J
E 1500Jg^-1

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Question 32:

The speed of light in air is 3 x 10⁸ms^-1. If the refractive index of light from air-to-water is \(\frac{4}{3}\), then which of the following is the correct value of the speed of light in water?

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A 4 x 10⁸ms^-1
B 2.25 x 10⁸ms^-1
C \(\frac{4}{9}\) x 10⁸ms^-1
D 2.25 x 10²ms^-1
E 4.33 x 10⁸ms^-1

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Question 33:

On which of the following is the operation of a moving coil galvanometer based?

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A Magnetic effect of electric current
B Electromagnetic induction
C Chemical reaction produced by electricity
D Force on current carrying conductor in a magnetic field
E Electrical energy and power

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Question 34:

A body is released from rest and allowed to fall freely from a given height under gravity. The kinetic energy at its half-way point is

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A A little above half of its initial energy
B A little below half of its initial energy
C A half of its initioal energy
D A little above its initial energy
E A little below its initial energy

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Question 35:

It is known that a neutron exists in a light atomic nucleus. Which of the following also exists in the nucleus?

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A An electron
B A \(\beta\)-particle
C An \(\alpha\)-particle
D A proton
E An atom

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