A battery is connected with a potentiometer wire. The internal resistance of the battery is negligible. If the length of the potentiometer wire of the same material and radius is doubled then what happens to potential gradient?
Potential gradient or potential difference per unit length of the wire depends directly upon the following factors:
- Current through the wire.
- Specific resistance (resistivity) of the wire.
- inversely proportional area of cross-section of the wire.