#### Question

Which uses more energy, a 250 W TV set in 1 hr, or a 1200 W toaster in 10 minutes?

#### Solution

Energy consumed by an electrical appliance is given by the expression,H= Pt

Where,

Power of the appliance = *P*

Time = *t*

Energy consumed by a TV set of power 250 W in 1 h = 250 ×3600 = 9 ×10^{5} J

Energy consumed by a toaster of power 1200 W in 10 minutes = 1200 ×600

Energy consumed by a toaster of power 1200 W in 10 minutes = 1200 ×600

= 7.2×10^{5} J

Therefore, the energy consumed by a 250 W TV set in 1 h is more than the energy consumed by a toaster of power 1200 W in 10 minutes.

Is there an error in this question or solution?

Solution Which Uses More Energy, a 250 W Tv Set in 1 Hr, Or a 1200 W Toaster in 10 Minutes? Concept: Electric Power.