Question on: JAMB Physics - 2002
A
7.5 x 10-3J
B
2.5 x 10-3J
C
1.5 x 10-2J
D
7.5 x 10-1J
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Correct Option: D
Energy store is equal to the work done in stretching the wire from E to F given by the area of the shaded trapezium under the graph.
= 1/2(0.1 x 0.2) x (0.1 - 0.05)
= 1/2(0.3) x 0.05
= 0.15 x 0.05
= 0.075
= 7.5 x 10-1J
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