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Who will spend more eletrical energy,500...

Who will spend more eletrical energy,500 W TV set in 30 mins or 600W heater in 20 mins?

Text Solution

Verified by Experts

The correct Answer is:
The energy consumed by T.V. set is more than that consumed by heater.
For T.V. set : Power = 500 W, Time = 30 min = `30xx60s`
`therefore" Energy "="Power"xx"time"`
`E_(1)=500xx30xx60=900xx10^(3)J`
For heater: Power = 600W,
Time = 20 min = `20xx60s`
`therefore" Energy "(E_(2))=600xx20xx60=720xx10^(3)J`
Comparing `E_(1) and E_(2), E_(1)gt E_(2)`
`therefore" Energy spend by T.V. set "(E_(1))` is greater.
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