This video channel is developed by Amrita University's CREATE
http://www.amrita.edu/create

▶ For more Information @
http://amrita.olabs.edu.in/?sub=1&brc...

▶ Amrita Online Lab Project Website
http://www.olabs.edu.in/

▶ Subscribe @
   / amritacreate  

▶ Like us @
  / createatamrita  


Copyright © 2017 Amrita University
Developed by Amrita University & CDAC Mumbai. Funded by MeitY (Ministry of Electronics & Information Technology)

Potentiometer : Comparison of EMF :
Potentiometer is a simple device used to measure the electro motive force, potential difference across a resistor and internal resistance of a cell. It consists of a board where a tungsten or manganese wire is fitted on it. The wires have uniform crosssectional area and of 10 m in length. The wires are joined in series by using thick copper strips. A metre scale is also attached on the wooden board. It works on the principle that the potential dropped between two points in a wire of uniform cross section is directly proportional to the distance between the points.

This video explains how to compare the emf’s of two given primary cells using a potentiometer.