Question

State two differences between the e.m.f and terminal voltage of a cell. 

Answer 1

	e.m.f. of cell	Terminal voltage of cell
1	The amount of work required to move a unit positive charge in the entire circuit both inside and outside the cell serves as the measurement.	The amount of work required to move a unit of positive charge outside the cell serves as the measurement.
2	It is the characteristic of the cell i.e., it does not depend on the amount of current drawn from the cell	It depends on the amount of current drawn from the cell. The more current drawn from the cell, the lower the terminal voltage.
3	It is equal to the terminal voltage when the cell is not in use and greater than the terminal voltage when the cell is in use.	It is equal to the cell's EMf when it is not in use, while it is less than the EMf when it is in use.