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A heating coil rated 1000 W is used to boil off completel...

A heating coil rated 1000 W is used to boil off completely 2 kg of boiling water. The time required to boil  the water is?
[Special latent heat of Vaporization of water = 2.3 x 106 Jkg-1]

A.

1.15 x 104s

B.

1.15 x 103s

C.

4.6 x 104s

D.

4.6 x 103s

Correct answer is D

Heat supplied = Heat gained
pt = ml
T = mlp

= 2×2.3×1061000

= 4.6 x 103 sec