Question

how much electrical energy in joules does a 100 watt lamp consume :(a)in 1 second? (b) in 1 minute?

Answer 1

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

Answer 2

Answer:6

Explanation:FIRST WE CONVERT WALT TO KILOWALT

THEREFORE , POWER OF LAMP=100WALT=0.1 KILOWALT

THEN WE CONVERT 1 MINUTE = SO,1MIN=60 SECS

FORMULA = P×t

60×0.1=6