Question

out of these two wires P and Q which one has the greater resistivity why​

Answer 1

wire a has greater resistivity becouse its croos section area is greater than wire b

as, resistance is inversely proportional to area of croos section of a conductor

Answer 2

wire P has greater resistivity

because

as the formula for R is rho l/A

for wire P it is as such rho l/A

but for wire Q it is rho l/A/2

is same as rho 2l/A

is same as 2 times rho l/A

hope it helps u

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