Question

the graph show the voltage current variations of two mettalic wires of same length and diameter kept at same const temperature which wire have greater resistivity justify​

Answer 1

Explanation:

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}R=Aρl

resistivity is directly proportional to resistance.

Now, as wire A has less slope, it has more resistance than B.

Answer: A has more resistivity than B