Question

v-i graph for the two wires A and B shown in the figure if both wires are made of same material and equal thickness which of the two is more length give justification of your answer​

Answer 1

In the given graph, if you draw a line parellel to the y axis cutting the wires A and B and use pythagoras theorem, you will find that Slope of A is greater than Slope of B

Slope of V-I graph gives us the value of resistance

So wire A has more resistance (or resistivity in this case) than wire B

Now, we know that

Resistivity = Rho Length/Area of cross section

So resistivity is directly proportional to the length and inversely proportional to the area of cross section

Since Wire A has greater resistivity, it is also greater in length.

Thus Wire A is more in length.

Answer 2

Explanation:

A is Greater Than B As A Has More Resistance Than B

So A Is The Answer

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