Waec 1993 Physics Past Questions And Answers

Note: You Can Select Post UTME Schools Name Below The Exam Year.
1

Which of the following is a percussion instrument?

  • A. Flute
  • B. Organ
  • C. Bell
  • D. Piano
View Discussion (0)WAEC 1993 OBJ
2

In the diagram below, three identical lamps each of 100 W are connected in parallel across a potential difference of 250 V. Calculate the reading of the ammeter.

  • A. 7.5A
  • B. 2.5A
  • C. 1.2A
  • D. 0.8A
View Discussion (0)WAEC 1993 OBJ
3

A short chain is usually attached to the back of a petrol tanker and trailing behind it so that the

  • A. petrol tanker is balanced on the road
  • B. heat generated by friction in the engine can be conducted to the earth
  • C. charges generated by friction in the tanker are conducted to the earth
  • D. tanker can move slowly as the chain touches the road surface
View Discussion (0)WAEC 1993 OBJ
4

Which of the following have the greatest penetrating power?

  • A. Beta rays
  • B. Alpha rays
  • C. Gamma rays
  • D. Electrons
View Discussion (0)WAEC 1993 OBJ
5

A body moves along a circular path with uniform angular speed of 0.6 rads-1 and at a constant speed of 3.0ms-1. Calculate the acceleration of the body towards the centre of the circle.

  • A. 25.0ms-2
  • B. 5.4 ms-2
  • C. 5.0ms-2
  • D. 1.8 ms-2
View Discussion (0)WAEC 1993 OBJ
6

Which of the following indicates the correct sequence of steps taken in charging a gold-leaf electroscope by induction? l. Removing the ebonite rod ll. Bringing a negatively charged ebonite rod close to the cap III. Earthing the cap IV. Disconnecting the earthing

  • A. III, II, I and IV
  • B. II, I, III and IV
  • C. III, IV II and I
  • D. II, III, IV and I
View Discussion (0)WAEC 1993 OBJ
7

(a) With the aid of a labelled diagram, describe an experiment to illustrate the relationship between the volume and the temperature of a given mass of air at constant pressure.

(b) A uniform capillary tube of negligible expansivity sealed at one end, contains air trapped by a pellet of mercury. The trapped air column is 13.7cm long at 0°C and 18.7cm long at 100°C. Calculate the cubical expansivity of the air at constant pressure.

(c) Using the kinetic theory of gases, explain why the volume of a fixed mass of gas at constant pressure increases with increase in temperature.

View Discussion (0)WAEC 1993 THEORY
8

The unit of inductance is

  • A. farad
  • B. henry
  • C. hertz
  • D. weber
View Discussion (0)WAEC 1993 OBJ
9

In a ripple tank experiment, a vibrating plate is used to generate ripples in the water. If the distance between two successive troughs is 3.5 cm and the wave travels a distance of 31.5 cm in 1.5 s, calculate the frequency of the vibrator

  • A. 3.0Hz
  • B. 6.0Hz
  • C. 12.0Hz
  • D. 27.0Hz
View Discussion (0)WAEC 1993 OBJ
10

The phenomenon of radioactivity was first discovered by

  • A. Marie Curve
  • B. Sir J.J Thomson
  • C. Henn Becquerel
  • D. Niels Bohr
View Discussion (0)WAEC 1993 OBJ