Waec Physics 1999 Past Questions and Answers

Question 26:

• WAEC 1999

The real image of an object formed by a converging lens of focal length 15cm, is three times the size of the object. Calculate the object distance

A. 60cm
B. 30cm
C. 20cm
D. 15cm

Question 27:

• WAEC 1999

Which of the following statements is not correct about long sight?

A. A Iong-sighted person can see distant objects clearly
B. Ight from a nearby object is focused behind the retina.
C. The eyeball is too short
D. The defect is corrected by using a diverging lens.

Question 28:

• WAEC 1999

The amplitude of a wave is the

A. Distance between two successive troughs of the wave
B. Separation of two adjacent particles vibrating in phase
C. Maximum displacement of the wave particle from the equilibrium position
D. Distance travelled by a wave in a complete cycle of its motion

Question 29:

• WAEC 1999

ln order to obtain a sound note of a high pitch from a wire stretched by a constant tension, the wire must be

A. Short and thick
B. Short and thin
C. Long and thick
D. Long and thin

Question 30:

• WAEC 1999

If the position of resonance in a resonance tube is 16.50cm from open end of the tube, calculate the distance from the open end to the next position where resonance occurs. (Neglect end-correction)

A. 24.75cm
B. 33.00cm
C. 41.25cm
D. 49.50cm