Electricity is supplied to a school along a cable of total resistance 0.5\(\Omega\) with the...

JAMB 1998

Electricity is supplied to a school along a cable of total resistance 0.5\(\Omega\) with the maximum current drawn from the mains as 100A. The maximum energy dissipated as heat for 1 hr is

A. 3.6 x 10³J
B. 5.0 x 10³J
C. 3.0 x 10⁵J
D. 1.8 x 10⁷J

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Correct Answer: Option D

Explanation

Elect. energy = I²Rt

= 100 x 100 x 0.5 x 3600

= 1.8 x 10⁷J

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Electricity is supplied to a school along a cable of total resistance 0.5\(\Omega\) with the...

Correct Answer: Option D

Explanation

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