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Heat Transfer

Q1: Which of the following is correct ?

A Rate = Driving force x Resistance

B Driving force = Rate x Resistance

C Resistance = Driving force x Rate

D Rate = Resistance/Driving force

ANS:B - Driving force = Rate x Resistance

The correct relationship for heat transfer (or any process following Ohm's law analogy) is: Rate = Driving force / Resistance In this equation:

  • The "Driving force" represents the temperature difference (or the difference in some other relevant property) that causes the heat transfer.
  • The "Resistance" represents the thermal resistance to the heat transfer, which depends on factors like material properties and geometry.
So, the correct statement would be: Rate = Driving force / Resistance



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