Derive the expression for the potential difference when the cell are connected in parallel
combination.
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The resistance of an object (i.e., a resistor ) depends on its shape and the material of which it is composed. Resistivity ρ is an intrinsic property of a material and directly proportional to the total resistance R, an extrinsic quantity that depends on the length and cross-sectional area of a resistor.
I hope you know the formula ...
Rough* l / A
Where greek letter rough is the constant..
Explanation:
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