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CBSE Class 10 Answered

which uses more energy,a 250W TV SET IN 1hr,or 1200W toaster in 10minutes ?
Asked by RAJESH | 12 Jul, 2013, 08:11: PM
answered-by-expert Expert Answer
For T.V set
Power (P) = 250w, Time (t) = 1hr=60×60=3600s
For Toaster
Power (P) = 1200w, Time (t) = 10min=10×60=600s
We know that Energy (E) = P×t
? Energy consumed by a TV set = 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 energy
consumed by a toaster of power 1200 W in 10 minutes.
Answered by | 13 Jul, 2013, 11:03: AM

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