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An electric heater operating at 220 volt...

An electric heater operating at 220 volts boils 5 litre of water in 5 minutes. If it is used on 110 volts, it will boil the same amount of water in

A

10 minuts

B

20 minutes

C

15 minutes

D

25 minutes

Text Solution

Verified by Experts

The correct Answer is:
B
`H=(V^(2))/(R)t`
`therefore(t_(2))/(t_(1))=(V_(1)^(2))/(V_(2)^(2))`
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