Ohm's Law
Ohm's Law: Overview
This topic covers concepts, such as, Ohm's Law, Resistance,V-I Graph and Ohmic Resistance etc.
Important Questions on Ohm's Law
The critical temperature for superconductors is the temperature at which the electrical resistivity of a metal

What are the factors that affects resistance?

The example of non ohmic resistance is _____ .

What happens to the resistance if the area of cross section of wire is tripled?


A copper wire has diameter and resistivity of . What will be the length of this wire to make its resistance ?

A wire of given material having length and area of cross-section has a resistance of . What would be the resistance of another wire of the same material having length and area of cross-section ?

What happens to the resistance of a wire when its length is doubled?

Which among the following graphs correctly represents ohms law?

Resistivity depends on which of the following?

Electrical resistivity of a given metallic wire depends upon:

Slope of the graph drawn in between resistance of a wire(R) and its length (L) is :

In an electric circuit, a device called rheostat is often used to change the _____ in the circuit.

If the potential difference across the two ends of a conductor is and the current through it is , then the resistance R, of the conductor is :


A student carries out an experiment and plots the V-I graph of three samples of nichrome wire with resistances respectively. Which of the following is true?
