Question

what is resistance?obtain an expression for the heat produced by an electric current.

Answer 1

Hey mate

Here is ur answer

Resistance is the property to resist the flow of current in a conductor.

Heat = I^2rt

Answer 2

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⬇️HERE IS YOUR ANSWER⬇️
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RESISTANCE = Resistance is the opposition that a substance offers to the flow of electric current.  It is represented by the uppercase letter R.  The standard unit of resistance is the ohm, sometimes written out as a word, and sometimes symbolized by the uppercase Greek letter omega


H is directly propotional to the sqaure of current in conductor
H is directly propotional to resistance of that wire
H is directly propotional to time


H = I^2RT
WHICH IS JOULES LAW OF HEATING

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