Question

a torch bulb is marked 60w ,220v.how much energy does it consume if used 1 hour​

Answer 1

Answer:-

E = 216 kj

Given:-

P = 60 w

V = 220 v

T = 1 hour

1 hr = 3600 s

To find :-

Energy consumed in 1 hr.

Solution:-

Energy consumed by torch bulb is given by :-

$E = P. T$

Now,

put the given value

We get,

→$E = 60 \times 36,00$

→$E = 216000 j$

Now , convert it in to kilojoules

→$1 KJ = 1000 j$

→$E = \dfrac{216000}{1000}$

→$E = 216 kj$

hence,

Electrical energy consumed by torch bulb is 216 kj in 1 hour .