Question

which uses more energy a 250W TV set in 1 hour or a 1200W toaster in 10 hour ​

Answer 1

Answer:

Energy consumed by the TVset = 250*3600 =9*105J ∴ Energy consumed by a toaster = 1200 × 600 = 7.2× 105J ∴ the energy consumed by a 250 W TV set in 1 h is more than the energyconsumed by a toaster of power 1200 W in 10 minutes.

Answer 2

Answer:

For T.V set

Power (p) = 250w, Time(t) = 1 hr = 60 × 60 = 3600s

For Toaster

Power(p) = 1200w, Time(t) = 10 min = 10 × 60 = 600s

We know that Energy (E) = P × t

Therefore, Energy consumed by a T.V set

250 × 3600 = 9 × 105J

Therefore, Energy consumed by a toaster

1200 × 600 = 7.2 × 105J

Therefore, The energy consumed by a 250w T.V set n 1 hr is more than the energy by a toaster of power 1200w in 10 minutes.