Question

If the current in the primary circuit is decreased,then balancing length is obtained in the potentiometer is at:

• A. Lower length
• B. Higher length
• C. Same length
• D. 1/3rd length

Answer 1

The correct option is B Higher length

As $E=Ir{l}_b$ where $l_b$ is the balancing length.
As E is constant
so When I decreases balancing length should increase.