An electric lamp marked 240v 60 W is left to op... - JAMB Physics 2009 Question
An electric lamp marked 240v, 60 W is left to operate for an hour. How much energy is generated by the filament?
A
3.86 x 105J
B
3.56 x 105J
C
1.80 x 104J
D
2.16 x 105J
correct option: d
Energy generated = power X time = 60w x 1h = 60 x 60 x 60 ws = 216000j = 2.16 x 105J
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