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Physics

Physics past questions and answers from WAEC and JAMB
Page 41

Mercury is suitable as a barometric fluid because it

a.

Expands uniformly

b.

Is several times denser than water

c.

Is opaque

d.

Is a good conductor of heat

A ball is projected horizontally from the top of a tower. Neglecting air resistance, which of the following statements about its motion is/are correct?

I. Vertical acceleration on the ball decreases as it falls
II. The vertical force on the ball remains constant
III. The vertical speed of the ball increases as it falls

a.

I only

b.

II only

c.

I and II only

d.

II and III only

In which of the following activities is an induction coil not useful?

a.

investigation of high voltages

b.

Study of electric discharges

c.

Operation of X-ray tubes

d.

power transmission

An ice cube floats in a glass of water filled to the brim. What happens when the ice melts?

a.

There is a drop in the level of water in the glass due to condensation on its outside

b.

The water level remains the same

c.

The water in the glass overflows

d.

The level of water drops because melted ice occupies less volume

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