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If a given volume of water in a 220 V h...

If a given volume of water in a `220 V` heater is boiled in `5 min`, then how much time will it take for the same volume of water in a `110 V` heater to be boiled?

A

`20 min`

B

`30 min `

C

`25 min`

D

`40 min`

Text Solution

Verified by Experts

The correct Answer is:
A
`H = V^(2) t // R`. When voltage is halved , the heat becomes one - fourth. Hence , time taken to heat the water becomes four times.
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