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

What is the other name for the unit :

(a) Joule per Coulomb

(b) Coulomb per second

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

How does current change with voltage when it is altered across a given resistance ?