What is the difference between a potentiometer and a voltmeter?

Answer:

Potentiometer	Voltmeter
The resistance is infinite.	The resistance is very high but not infinite.
It does not draw any current from the source of known e.m.f.	It draws some current from the source of e.m.f.
The potential difference measured is equal to the actual potential difference.	The potential difference measured Is less than the actual potential difference.
It has a sensitivity.	It has a low sensitivity.
It measures e.m.f as well as potential difference.	It only measures potential difference.
It is used to measure the internal resistance of a cell.	It cannot be used to measure the internal resistance of a cell.
It is more accurate.	It is less accurate.
It does not give a direct reading	It gives a direct reading.
It is not a portable device.	It is a portable device.
It is used to measure lower voltage values only.	It can be used to measure lower as well as higher voltage values.