Which of the following apparatus will require the smallest fuse rating for its protection?

Assessment: JAMB UTME - Physics - 1992 Subject: Physics

Question 1 Report

Which of the following apparatus will require the smallest fuse rating for its protection?

60W, 240V

60W, 40V

40W, 12V

40W, 5V

Answer Details

I =

\frac{P}{V}

=

\frac{60}{240}

= 0.25A

I = $\frac{P}{V}$ = $\frac{60}{40}$ = 1.5A

I = $\frac{P}{V}$ = $\frac{40}{12}$ = 3.3A

I = $\frac{P}{V}$ = $\frac{40}{5}$ = 8A

Read lesson note on Current Electricity (JAMB)

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Current Electricity

Electrical Energy And Power

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