The resistivity, P, of a material of length ...
The resistivity, P, of a material of length l, cross-sectional area A, resistance R, is given by the equation
P=RAl
P=lRA
P=RlA
P=RAl
Correct answer is A
resistivity P is directly proportional to the product of resistance and cross-sectional area and inversely proportional to the length of the wire
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