Physics JAMB Past Questions

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1466

A weight of 1000 grams hangs from a lever 20cm to the fulcrum. At the left is a 500-gram weight 20cm from the fulcrum, and a 200-gram weight x cm away from the fulcrum. What is the value of x that will make the lever balanced?

A. 50cm
B. 20cm
C. 10cm
D. 30cm
E. 70cm

View Answer & Discuss (26) JAMB 1979

1467

Radio carrier waves are generated by causing electrons to oscillate rapidly in

A. a microphone
B. a television camera
C. an antenna
D. coaxial cables
E. a transmitter

View Answer & Discuss (6) JAMB 1979

1468

Which of the following statements is correct? Silvered walls of a vacuum flask are used to prevent

A. heat loss due to conduction
B. vacuum loss
C. heat entry into the inner flask due to convection
D. heat loss due to radiation
E. heat loss due to convection

View Answer & Discuss (2) JAMB 1979

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1469

A man walks 1km due east and then 1km due north. His displacement is

A. 1 km N15^oE
B. 1 km N30^oE
C. \(\sqrt 2\)km N 45^oE
D. \(\sqrt 2\)km N 60^oE
E. 2km N 75^oE

View Answer & Discuss (15) JAMB 1978

1470

The frictional force between two bodies?

A. exists only when there is relative motion or tendency for motion
B. acts so as to oppose the motion
C. depends on the normal reaction between the two surfaces
D. is relatively independent of the area in contact
E. has all of these characteristics

View Answer & Discuss (24) JAMB 1978

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