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An immersion heater is rated 836 watt . ...

An immersion heater is rated 836 watt . It should heat 1 litre of water from `10^(@)C` to `40^(@)C` in about

A

200 sec

B

150 sec

C

836 sec

D

418 sec

Text Solution

Verified by Experts

The correct Answer is:
B
`P xx t = 4.2 sin xx msDeltatheta [1 "litre" = 1Kg]`
`rArr t =(4.2 xx 1 xx 1000(40-10))/836 = 150` sec
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