A) 5 minutes
B) 8 minutes
C) 10 minutes
D) 20 minutes
Correct Answer: D
Solution :
[d] Heat produced,\[H=\frac{{{V}^{2}}t}{R}.\] When voltage is halved, the heat produced becomes one fourth. Hence time taken to heat the water becomes four times.You need to login to perform this action.
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