A potentiometer wire of length 4 m has a resistance of 8 Q. It is connected in series with a battery of e.m.f. 2 volts and negligible internal resistance. If the e.m.f. of a cell balances against a length of 217 cm of wire. Find the e.m.f. of the cell. When the cell is shunted by a resistance of 15 Q the balance iength is reduced to 200 cın. Find the internal resistance of the cell.

A potentiometer wire of length 4 m has a resistance of 8 Q. It is connected in series with a battery of e.m.f. 2 volts and negligible internal resistance. If the e.m.f. of a cell balances against a length of 217 cm of wire. Find the e.m.f. of the cell. When the cell is shunted by a resistance of 15 Q the balance iength is reduced to 200 cın. Find the internal resistance of the cell.

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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