The resistance of a conductor would be …………… if a current of 2 A flows through it when the potential difference across its ends is 2 volt.

1. 2Ω
2. 0Ω
3. 1Ω
4. 4Ω

While performing an experiment, a student reduces the resistance to one half keeping the potential difference same. New reading of the current will be :

1. half
2. double
3. four times
4. one fourth

For what purpose is a battery connected in a circuit?

How will the resistance of a wire change if it is stretched ?