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Heat Transfer - Engineering

Q1:

Heat produced when a steady state current, I passes through an electrical conductor having resistance, 'R' is

A IR

B I2R

C IR2

D I2R2

ANS:B - I2R

The heat produced when a steady-state current, I, passes through an electrical conductor having resistance, R, is given by the formula: Heat=2×Heat=I2×R This is known as Joule's Law, which states that the heat generated in a conductor is directly proportional to the square of the current passing through it and the resistance of the conductor. Therefore, the correct option is: 2R.