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WAEC Physics

Page 18

The pitch of a note is not affected by

a.

Frequency

b.

tension in a vibrating string

c.

mass of a vibrating string

d.

amplitude of sound wave

A converging lens of focal length 10cm forms an erect image three times the size of the real object. Calculate the distance between the object and the image

a.

6.6 cm

b.

11.1 cm

c.

13.3 cm

d.

20.0 cm

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

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