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ICSE Class 10 Answered

Explain and differentiate between e.m.f. of a cell and terminal voltage of a cell . 
Asked by Pushpanjali | 24 Mar, 2017, 03:40: PM
answered-by-expert Expert Answer

Hi Abhishek,

When no current is drawn from a cell i.e., when the cell is in open circuit, the potential difference between the terminals of the cell is called its electro-motive force (or e.m.f.).

When current is drawn from a cell, i.e., when the cell is in a closed circuit, the potential difference between the electrodes of the cell is called its terminal voltage.

Hence, we can say that emf is greater than or equal to terminal voltage.

Answered by | 24 Mar, 2017, 06:20: PM
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