Waec 1996 Physics Past Questions And Answers

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

A sound wave of velocity 350 ms-1 is directed towards the surface of water. lf the ratio of the wavelength of sound in water to that in air is 425:100, calculate the velocity on the wave in water

  • A. 82.4ms-1
  • B. 148.8ms-1
  • C. 350.0ms-1
  • D. 1487.5ms-1
View Discussion (0)WAEC 1996 OBJ
2

Soft iron is used in making the armature of an electric bell because it

  • A. retains its magnetism for a longtime
  • B. Loses its magnetism readily
  • C. Produces permanent magnets
  • D. is not easily magnetised
View Discussion (0)WAEC 1996 OBJ
3

The speed of sound in air is 330ms-1. How far from the centre of a storm is an observer who hears a thunder clap 2s after the lightning flash? (Neglect the time taken by light to travel to the observer)

  • A. 1320m
  • B. 660m
  • C. 600m
  • D. 330m
View Discussion (0)WAEC 1996 OBJ
4

Which of the following is not a component of a d.c. electric motor?

  • A. Commutator
  • B. Field magnets
  • C. Slip rings
  • D. Armature
View Discussion (0)WAEC 1996 OBJ
5

A loaded test-tube which floats upright in water is carefully and slightly depressed and then released. Which of the following best describes the sub-sequent motion of the test-tube?

  • A. Circular
  • B. Rotational
  • C. Random
  • D. Oscillatory
View Discussion (0)WAEC 1996 OBJ
6

The diagram below illustrates a variation of the displacement y of a wave particle with time t. lf the velocity of wave is 250ms-1, calculate the distance between two successive particles which are in phase

  • A. 20m
  • B. 2.5m
  • C. 3.0m
  • D. 5.0m
View Discussion (0)WAEC 1996 OBJ
7

(a) What is meant by dispersion of white light?

(b) State the colours in the spectrum of white light in ascending order of their wavelengths

(c) Which colour is deviated.

(i) least

(ii) most?

(d) Explain why white light is dispersed when it passes through a glass prism.

(e) Describe, with the aid of a labelled diagram, how a pure spectrum of white light can be produced on a screen.

View Discussion (0)WAEC 1996 THEORY
8

CalcuIate the power delivered by a 3-phase line if its voltage and current at 132KV and 60A respectively

  • A. 2.38 x 107W
  • B. 7.92 x 106W
  • C. 3.96 x 106W
  • D. 2.64 x 106W
View Discussion (0)WAEC 1996 OBJ
9

A converging lens of focal length 5cm forms a virtual image which is 10cm from the lens. How far from the lens is the object?

  • A. 2.0cm
  • B. 3.3cm
  • C. 5.0cm
  • D. 10.0cm
View Discussion (0)WAEC 1996 OBJ
10

Which of the following is used in a nuclear reactor to slow down fast-moving neutrons?

  • A. Carbondioxide gas
  • B. Liquid sodium metal
  • C. Concrete shield
  • D. Graphite rods
View Discussion (0)WAEC 1996 OBJ