Question

Calculate the electric energy consumed by a 1200w toaster in 20 minutes

Answer 1

we know that,

power=voltage×current

=VI =VQ/t

also QV= electric energy

=> electric energy = power x time

1200 x 20 x 60

= 1440000 J

$= 1.44\times 10^{-6}$

Answer 2

Answer:

Energy consumed = 0.4kwh.

Explanation:

Given, E = Pt

It is given that : P = 1200W

We know that, E = P × t

[Where p = electric power and t = time]

E=1200×20/60=400 W=0.4kwh

Hence, Energy consumed = 0.4kwh.