Waec Physics 2005 Past Questions and Answers

Question 26:

• WAEC 2005

Which of the following statements about a progressive mechanical wave is correct?

A. It can be a plane polarised
B. Its energy is localised at specific points of its profile
C. It does not require a material medium for its propagation
D. Its frequency remains constant as it travels between different media

Question 27:

• WAEC 2005

The distance between two points in phase on a progressive wave is 5cm. If the sped of the wave is 0.2ms^-1, calculate its period

A. 4.00s
B. 2.50s
C. 0.25s
D. 0.04s

Question 28:

• WAEC 2005

Radio waves travel in air at 3.0 x 10⁸ms^-1. If the waves enter water of refractive index \(\frac{4}{3}\), calculate the speed of radio waves in water

A. 4.33 x 10⁸ms^-1
B. 4.00 x 10⁸ms^-1
C. 2.25 x 10⁸ms^-1
D. 1.33 x 10⁸ms^-1

Question 29:

• WAEC 2005

The amplitude of a wave is the

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

Question 30:

• WAEC 2005

Which of the following optical instruments does not depend on the use of plane mirrors?

A. Kaleidoscope
B. Simple microscope
C. Sextant
D. Simple periscope