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 inA. 10 minutsB. 20 minutesC. 15 minutesD. 25 minutes

An electric heater operating at 220 volts boils 5 litre of water in 5

1.	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 inA. 10 minutsB. 20 minutesC. 15 minutesD. 25 minutes
Answer» Correct Answer - B `H=(V^(2))/(R)t` `therefore(t_(2))/(t_(1))=(V_(1)^(2))/(V_(2)^(2))`

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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 inA. 10 minutsB. 20 minutesC. 15 minutesD. 25 minutes

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