Waves - Jamb Physics Past Questions and Answers

Question 51:

• JAMB 1999

The diagram above represents a transverse electromagnetic wave travelling with speed 3.0 x 10⁸ms^-1. What is the frequency of the wave.

A. 3.0 x 10⁷Hz
B. 9.0 x 10⁷Hz
C. 1.0 x 10⁹Hz
D. 3.0 x 10⁹Hz

Question 52:

• JAMB 2000

I. Coherence
II. Same frequency
III. Same wavelength
IV. Same Intensity
Which of the conditions above are necessary to produce interference fringes?

A. I and III
B. I, II and IV
C. I, II and III
D. II and III

Question 53:

• JAMB 2000

One end of a long wire is fixed while a vibrator is attached to the other end. When the vibrator is energized, the types of waves generated in the wire are

A. Stationary and longitudinal
B. Stationary and transverse
C. Progressive and transverse
D. Progressive and longitudinal

Question 54:

• JAMB 2000

A sonometer wire is vibrating at frequency f_o. If the tension in the wire is doubted while the length and the mass per unit length are kept constant, the new frequency of vibration is

A. ^f_o/₂
B. 2f_o
C. ^f_o/_√2
D. F_o√2

Question 55:

• JAMB 2000

A travelling wave moving from left to right has an amplitude of 0.15m, a frequency of 550Hz and a wavelength of 0.01m. The equation describing the wave is

A. Y = 0.15 sin 200Ï€(x - 5.5t)
B. Y = 0.15 sin π(0.01x - 5.5t)
C. Y = 0.15 sin 5.5Ï€(x - 200t)
D. Y = 0.15 sin π(550x - 0.01t)