Question

what are the practical uses of meter bridge and potentiometer?

Answer 1

potentiometer is an electric device which is used to regulate EMF and internal resistance of a given cell. This helps in providing a variable resistance and therefore, a variable potential difference arising between two points in an electric circuit.
The meter bridge uses the sameprinciple as the Wheatstone Bridge. It is used to find the unknown Resistance of the Material. ... Now until the galvanometer shows a zero or null deflection, adjust the value of resistance in the resistance box and slide the jockey through the wire