Question

Power of a lamp is 60 W. Find the energy in joules consumed by it in 1s.

Answer 1

We know that the power can be stated as the amount of electric energy consumed per unit time.

Power, P = \(\frac{Energy\,consumed,E}{Unit\,time,T}\)

On solving For Energy, we get 

Energy, E = \(\frac{P}T\)

Here; 

P = 60W 

t = 1s 

E = 60W x 1sec

∴ E = 60J

Thus, the energy in joules is 60J