Jamb Physics 1982 Past Questions and Answers

Question 6:

• JAMB 1982

The tyre pressure of a car was found to be 150cmHg in the morning at a temperature of 27°C. Hard driving in the afternoon raised the temperature of the tyres by 57°C. The tyre pressure had by the afternoon was

A. Increased by 15.0cm Hg
B. Decreased by 15.0cm Hg
C. Increased by 22.50cm
D. Decreased by 22.50cm Hg
E. Remained constant

Question 7:

• JAMB 1982

The echo of a sounder from the bottom of an ocean is heard 2.5 seconds later. If the speed of sound in water is 1,400ms^-1, the depth of the ocean is

A. 1,750m
B. 3,500m
C. 1,400m
D. 2,800m
E. 2,100m

Question 8:

• JAMB 1982

An electric iron is rated at 1000watts, 250v. The corresponding maximum resistance and accompanying current is

A. 62.5A, 4.0\(\Omega\)
B. 16.0A, 62.5\(\Omega\)
C. 62.5A, 16.0\(\Omega\)
D. 4.0A, 62.5\(\Omega\)
E. 4.0A, 250\(\Omega\)

Question 9:

• JAMB 1982

The force responsible for holding the moon in its orbit around the earth against the gravitational pull of the earth is

A. Centrifugal
B. Rotational
C. Reaction
D. Centripetal
E. Tractional

Question 10:

• JAMB 1982

A mango fruit drops from a branch 10m above the ground, just before hitting the ground its velocity is (g = 10ms^-2)

A. 10√2ms^-1
B. 10ms^-1
C. 100ms^-1
D. 5√2ms^-1
E. 200ms^-1