A potentiometer wire of length 1m is connected to a driver cell of emf 3 V as shown in the figure. When a cell of 1.5 V emf is used in the secondary circuit, the balance point is found to be 60 cm. On replacing this cell and using a cell of unknown emf, the balance point shifts to 80 cm. A

A potentiometer wire of length 1m is connected to a driver cell of emf 3 V as shown in the figure. When a cell of 1.5 V emf is used in the secondary circuit, the balance point is found to be 60 cm. On replacing this cell and using a cell of unknown emf, the balance point shifts to 80 cm. A

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Question

A potentiometer wire of length 1m Is
connected to a driver cell of emf 3 V as shown
in the figure. When a cell of 1.5 V emf is used in
the secondary circuit, the balance point is
found to be 60 cm. On replacing this cell and
using a cell of unknown emf, the balance point
shifts to 80 cm.
A.
B
1.5 V
to
R
(i) Calculate unknown emf of the cell.

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