Q. 535.0( 1 Vote )
The condition for no deflection through the galvanometer is
Let the potentiometer wire be at l cm from A when there is no deflection through galvanometer.
Let the resistance per cm of the potentiometer wire be be ρ .
Hence, and .
Using the equation when there is no deflection for a Wheatstone bridge/potentiometer, we have
Hence, the free end of the galvanometer must be 16cm from point A.
Rate this question :