Question

state Ohm's law draw a graph between voltage and current for a metallic conductor define resistivity state its unit what is the effect of temperature on the resistivity of metal

Answer 1

According to the ohms law,the the current flowing through a wire is directly proportional to the potential difference accross it's ends....

Restivity is the resistance of the conductor when are of cross section is 1 m^2 and length is 1 m. It's unit is ohm metre...

There is effect of temperature on restivity...it changes according to the temperature..

Answer 2

According to the ohm 's law, the potential difference V between the two points in an electric circuit is directly proportional to the current flowing in it.

V/I=R

For graph, refer to the chapter. Electricity in NCERT textbook.

Resistivity is the resistance offered by a conductor of unit length an unit cross sectional area. Increase in temperature leads to decrease in resistivity.