A heating coil rated 1000 W is used to boil off completely 2 kg of boiling water. the time required to boil of the water is
[Special latent heat of Vaporization of water = 2.3 x 106 Jkg-1]
[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: Option D
Explanation
Heat supplied = Heat gained
pt = ml
T = (ml)/p = (2 x 2.3 x 106)/1000 = 4.6 x 103 sec