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
Verified Correct Answer: D.
Physical Principles & Numerical Solution
Energy generated = power X time = 60w x 1h = 60 x 60 x 60 ws = 216000j = 2.16 x 105J
Source: Myschool Past Questions Archive (Record #14258)