anshi my guru what is potentiometer and it's working ?
Answers
potentiometer
the the device used to measure the unknown potential difference accurately.
principal
The potentiometer works on the principle that when a constant current flows through a wire of uniform cross sectional area, potential difference between its two points is directly proportional to the length of the wire between the two points.
V = kl
where k = potential gradient.
potential gradient
the fall of potential per unit of potentiometer wire is called potential gradient.
SI unit of potential gradient is volt per metre.
i hope it helps you
=>The Potentiometer is an electric instrument that is used to measure the EMF (electro motive force) of a given cell and the internal resistance of a cell. It is also used to compare the EMFs of different cells
=>The basic working principle of this is based on the fact that the fall of the potential across any portion of the wire is directly proportional to the length of the wire, provided the wire has a uniform cross-sectional area and A constant current is flowing through it.
#answerwithquality #BAL