Question

At what moment when the potentiometer is balanced ,

• A. Current flows only in the primary circuit.
• B. Current flows only in the secondary circuit.
• C. current flows in both primary and secondary circuits .
• D. current doesnot flow in any circuit

Answer 1

The correct option is A Current flows only in the primary circuit.

At the balanced condition of potentiometer, potential difference across secondary circuit is equal to the EMF of battery of secondary circuit, so there is no current in secondary circuit, but primary circuit work as it is. so current only flows in primary circuit.