Heat is supplied to a test tube containing 100g of ice at its melting point. The ice melts completely in 1 min.What is the power rating of the source of heat? [Latent heat of fusion of ice = 336Jg-1]
A
336W
B
450W
C
560W
D
600W
Verified Correct Answer: C.
Physical Principles & Numerical Solution
p x t = heat energy
P x 1 x 60 = 100 x 336
p = 560W
Source: Myschool Past Questions Archive (Record #27908)