In an experiment with a potentiometer, `V_(B)=10V`. R is adjusted to the
Channel: Doubtnut
Date: 19/01/2020

In an experiment with a potentiometer, `V_(B)=10V`. R is adjusted to the `50Omega` (figure). A student wanting to measure voltage `E_(1)` to a battery (approx. 8V) finds no null point possible. He then diminishes R to `10Omega` and is able to locate the null point ont he last (4th) segment of the potentiometer. find the resistance of the potentiometer wire and potential drop per unit length across the wire in the second case.