Waec Physics 2004 Past Questions and Answers

Question 26:

• WAEC 2004

On a basis of the kinetic theory, an increase in the temperature of a fixed volume of an ideal gas causes

A. A incease in the number of gas molecules
B. A decrease in the density of the gass
C. An increase in the average speed of the gas molecules
D. A decrease in pressure exerted by the gas

Question 27:

• WAEC 2004

The temperature of 900cm³ of an ideal gas at a pressure of 114cm Hg is 27^oC. Calculate its volume at 76cm Hg and 0^oC

A. 50.0cm³
B. 546.0cm³
C. 659.3cm³
D. 1228.5cm³

Question 28:

• WAEC 2004

The basic difference between a transverse wave and a longitudinal wave travelling in the same direction in a medium is in the

A. Amplitude of the wave
B. Wavelength of the wave
C. Direction of vibration of the particles of the medium
D. Period of vibration of the particle of the medium

Question 29:

• WAEC 2004

A wave travelling from water to glass suffers a change in its speed at the common boundary. Which of the following properties explains this observation?

A. Dispersion
B. Refraction
C. Interference
D. Diffraction

Question 30:

• WAEC 2004

The image of an optical pin placed at the principal focus of a concave mirror will be formed

A. Between the principal focus and the pole
B. At the centre of the curvature
C. Between the principal focus and the centre of curvature
D. At infinity