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 the lamp, (P) = 100 W
(a) Time, (t) = 1 s
Now, we can calculate the electrical energy consumed as:
Energy consumed = Power × Time
So,
Energy consumed = 100 × 1 J
$=\boxed{100\mathrm{J}}$
So, the energy consumed is 100 J.

(b) Time (t) = 60 s
Now, we can calculate the electrical energy consumed as,
Energy consumed = Power × Time
So,
Energy consumed = 100 × 60 J
$=\boxed{6000\mathrm{J}}$
So, the energy consumed is 6000 J.