A meter bridge is an apparatus used to measure, calculate and determine an unknown resistance using a known relationship given through the resitivity correlation to length.
Wooden board Measuring; Length 120cm, Width 18 cm and Thickness 2cm was used locally constructed with the instrument Wire and metal strips such as standard resistor, Unknown resistor, galvanometer, battery, Sliding contact and Keys are other accessories used in the construction project.
Galvanometer is instrument for measuring a small electrical current or a function of the current by deflection of a moving coll.
The purpose of the battery in a series circuit is to give the circuit a source of energy.