Question

calculate the electric energy consumed by a 1200w toaster in 20 mintes

Answer 1

Given, P=1200W
t=20min=20*60=1200s
We know, P=W/t
The rate of doing work or consumption of energy is power
So, P=E/t
So, E=Pt
=1200*1200=1440000J=1440kJ

Answer 2

Answer:

P=1200W

t=20min=20*60=1200s

We know, P=W/t

The rate of doing work or consumption of energy is power

So, P=E/t

So, E=Pt

=1200*1200=1440000J=1440kJ

Explanation:

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