JAMB - Physics (1978 - No. 23)

If NEPA charges 5k per kWhr, what is the cost of operating for 24 hours a lamp required 1A on a 200v line?
24k
55k
40k
26k
32k

Explanation

Energy (kWhr) = 1 x 200 x 24 x 10-3

= 4.8kWhr

1 kWhr. cost 5k

4.8kwhr. will cost (5 x 4.8)k

= 24 kobo

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