2018 - JAMB Physics Past Questions and Answers - page 9
81
Which of the following instruments is most suitable for measuring the outside diameter of a narrow pipe in a few millimeters in diameter?
A
Pair of calipers
B
Meter rule
C
Micrometer screw gauge
D
Tape rule
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82
Electrical power is transmitted at a high voltage rather than a low voltage because the amount of energy loss is due to
A
Heat dissipation
B
Production of eddy currents
C
Excessive current discharge
D
Excessive voltage discharge
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83
If the focal length of a camera is 20cm, the distance from the film at which the lens must be set to produce a sharp image of 100cm away is
A
17cm
B
20cm
C
25cm
D
100cm
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