When using a potentiometer to measure the emf of a cell, what condition must be satisfied?
Correct Answer: Circuit must be open.
- Step 1: Understand what a potentiometer is. It is a device used to measure the electromotive force (emf) of a cell.
- Step 2: Know that emf is the voltage provided by a cell when no current is flowing.
- Step 3: Realize that to measure the emf accurately, you need to prevent any current from flowing through the cell.
- Step 4: Ensure that the circuit is open, meaning there should be no complete path for current to flow.
- Step 5: With the circuit open, connect the potentiometer to the cell to measure the emf.
No concepts available.
