Jamb Physics 1994 Past Questions and Answers

Question 21:

• JAMB 1994

The equation of transverse wave traveling along a string is given by Y = 0.3 sin(0.5x - 50t) where Y and X are in cm and t is in seconds.Find the maximum displacement of the particles from the equilibrium position

A. 50.0cm
B. 2.5 cm
C. 0.5cm
D. 0.3cm

Question 22:

• JAMB 1994

The sound from a source travelled to the bottom of the sea and the echo was heard 4s later. If the speed of sound in sea water is 1500ms^-1 the depth of the sea is

A. 6000m
B. 3000m
C. 1500m
D. 375m

Question 23:

• JAMB 1994

The fundamental frequency of vibration of a sonometer wire may be halved by

A. Doubling the length of the wire
B. Doubling the mass of the wire
C. Reducing the tension by half
D. Reducing the absolute temperature by half

Question 24:

• JAMB 1994

A pipe of length 45cm is closed at the end. Calculate the fundamental frequency of the sound wave generated in the pipe if the velocity of sound in air is 360ms^-1 [Neglect end correction]

A. 5.5Hz
B. 148.5Hz
C. 200.0Hz
D. 550.0Hz

Question 25:

• JAMB 1994

The note produced by a stretched string has a fundamental frequency of 400Hz. If the length of the string is doubled while the tension in the string is increased by a factor of 4, the frequency is

A. 200Hz
B. 400Hz
C. 800Hz
D. 1600Hz