Question

DRAW+THE+SHAPE+OF+V-I+GRAPH+FORA+COPPER+WIRE

Answer 1

$\huge{\tt\pink{Answer:}}$

V−I graph for two wires A and B are shown in the figure. If the both wires are of same length and same thickness, which of the two is made of a material of high resistivity?

From the graph, slope of wire A is greater slope = dx\dy =VIR = VI = slope

Hence wire A has greater resistance. The heat produced by resistor is given by P = I2 RT. It is directly proportional to square of current paring through it resistance and time for which the current passes through the conductor. Hence A wire is made of a material of high resistivity.

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