A meter bridge, also known as a slide wire bridge, is a device used to measure the resistance of a conductor and determine the unknown resistance of a given component.
It consists of a long wire, usually made of a uniform material with a known resistance, stretched between two terminals. The wire is connected in a circuit with the component whose resistance is to be measured. A sliding contact, called a jockey, is moved along the wire until a null point is reached, where no current flows through the galvanometer in the circuit.
By using the known resistance and the position of the jockey, the unknown resistance can be calculated using the principle of Wheatstone’s bridge. The meter bridge is a common tool in physics laboratories for studying electrical circuits and measuring resistances accurately.
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