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How much time heater will take to increa...

How much time heater will take to increase the temperature of 100g water by `50^(@)C` if resistance of heating coil is `484Omega` and supply voltage is 220V a.c.,

Text Solution

Verified by Experts

Heat given heater=heat taken by water
`rArr (V^(2))/(R)t=ms Jdeltatheta`
`rArr(220xx220)/(484)t=(100xx10^(-3))(4.2xx10 ^(3))(50)`
`rArr t=210` sec
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