It takes 4 minutes to boil a quantity of water using an electrical heating coil. How long will it take to boil the same quantity of water using the same coil if the current is doubled? [Neglect any external heat losses]

8 minutes

4 minutes

2 minutes

1 minute

Correct Option

No explanation available

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3 years ago

Formula is I²Rt

Option (D) is correct

3 years ago

for heating coils is H=I²Rt so option D is correct

2 months ago

option D Is the right answer

1 year ago

@myschool D is correct

3 months ago

pls the answer is D, you didn't account for the ² on I

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