Question

The voltage current variation of two metallic wires X and Y at Constant temperature. Assuming that the wires have the same diameter, explain which of the two wires will have large restivity

Answer 1

Answer:

We have V=IR.

Comparing with y=mx, I=(1/R)V.

Thus the slope is 1/R, and greater the slope of the line, smaller is the resistance.

Since R=\frac{\rho l}{A}

resistivity is directly proportional to resistance.

Now, as wire y has less slope, it has more resistance than x.

Answer: y has more resistivity than x