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Heat is supplied to a test tube containing 100g of ice at its melting point. The ice ...

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]
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  • A 336W
  • B 450W
  • C 560W
  • D 600W
Correct Answer: Option C
Explanation:
p x t = heat energy
P x 1 x 60 = 100 x 336
p = 560W

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