In the diagram above a 200 W bulb is lighted by... - JAMB Physics 2010 Question
A
N1,920.00
B
N192.00
C
N19.20
D
N1.92
correct option: b
Energy consumed = power x time
= 200W x 24hr = 4800wh
= 4.8 kwh
But 1 kwh cost N40
∴ 4.8kwh costs 4.8 x 40
= N192
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