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Question
How much electrical energy in joules does a 100 watt lamp consume :
(a) in 1 second ?
(b) in 1 minute ?
How much electrical energy in joules does a 100 watt lamp consume :
(a) in 1 second ?
(b) in 1 minute ?
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Solution
Power of a lamp = 100W
a) When time taken is 1 second,
Power = Energy consumed/ Time taken
Energy consumed = 100 x 1 = 100 J
b) When time taken is 1 minute = 60 seconds,
Power = Energy consumed/ Time taken
Energy consumed = 100 x 60 = 6000 J = 6 kJ
R
a) When time taken is 1 second,
Power = Energy consumed/ Time taken
Energy consumed = 100 x 1 = 100 J
b) When time taken is 1 minute = 60 seconds,
Power = Energy consumed/ Time taken
Energy consumed = 100 x 60 = 6000 J = 6 kJ
R
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