Waec Physics 2010 Past Questions and Answers

Question 31:

• WAEC 2010

A ray of light travels from air to water. The refeactive index of water is given by the expression

A. \(\frac{\text{velocity in water}}{\text{velocity in air}}\)
B. \(\frac{\text{sine of angle of refraction}}{\text{sine of angle of incidence}}\)
C. \(\frac{\text{apparent depth}}{\text{real depth }}\)
D. \(\frac{\text{wavelength in air}}{\text{wavelength in water}}\)

Question 32:

• WAEC 2010

A lens that is thinner at the middle and thicher at the edges is

A. Diverging
B. Converging
C. Plano-convex
D. Converging meniscus

Question 33:

• WAEC 2010

Which of the following electromagnetic wave has the longest wavelength?

A. Radio-waves
B. Gamma rays
C. Infrared waves
D. Ultraviolet rays

Question 34:

• WAEC 2010

The amplitude of a sound wave determines its

A. Frequency
B. Quality
C. Loudness
D. Pitch

Question 35:

• WAEC 2010

As the air column of length L in an air pipe decreases, the frequency of the sationary wave emitted

A. Decreases
B. Increases
C. Varies as L²
D. Varies as \(\sqrt{L}\)