Simple Harmonic Motion (S.H.M) - Jamb Physics Past Questions and Answers

Question 11:

• JAMB 1990

A sonometer wire of length 100cm under a tension of 10N, has a frequency of 250Hz. Keeping the length of the wire constant, the tension is adjusted to produce a new frequency of 350Hz. The new tension is

A. 5.1N
B. 7.1N
C. 14.0N
D. 19.6N

Question 12:

• JAMB 1991

A boy timed 30 oscillations of a certain pendulum thrice and obtained 1min. 10s, 1min. 12s and 1min. 7s respectively.The mean period of oscillation of the pendulum is

A. 0.14s
B. 0.43s
C. 2.32s
D. 6.97s

Question 13:

• JAMB 1992

Which of the following affects the period of a simple pendulum? i. mass of the pendulum bob. ii. length of the pendulum. iii. acceleration due to gravity.

A. I, ii, and iii
B. Ii and iii only
C. I and iii only
D. I and ii only

Question 14:

• JAMB 1992

What is the frequency of the sound made by a siren having a disc with 32 holes and making 25 revolution per seconds?

A. 80Hz
B. 600Hz
C. 800Hz
D. 1600Hz

Question 15:

• JAMB 1994

A force of 15N stretches a spring to a total length of 30cm. An additional force of 10N stretches the spring 5cm further. Find the natural length of the spring

A. 25.0cm
B. 22.5cm
C. 20.0cm
D. 15.0cm