A
10 m long uniform metallic write having a resistance of
20 Ω is used as a potentiometer wire. This wire is connected in series with another resistance of
480 Ω and a battery of emf
5 V having negligible internal resistance. If an unknown emf e is balanced across
6 m of the potentiometer wire, calculate:
(i) The potential gradient across the potentiometer wire.
(ii) The value of the unknown emf e.
![596682_7c414b86734140698a0f624cd4eb219c.png](https://search-static.byjusweb.com/question-images/toppr_ext/questions/596682_7c414b86734140698a0f624cd4eb219c.png)