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

Physics
JAMB 1994
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
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Correct Answer: Option C
Explanation
p x t = heat energy

P x 1 x 60 = 100 x 336

p = 560W
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