Obtain the expressions for sensitivity and figure of merit of galvanometer giving its principle. On what factors does it depend?
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Objective
To determine the resistance of a galvanometer by half deflection method and to find its figure of merit.
Theory
Galvanometer
A galvanometer is a device used to detect feeble electric currents in a circuit. It consists of a coil suspended between the poles of a powerful magnet. As current passes through the coil, it deflects. It can be detected from the deflection on galvanometer needle. The deflection is proportional to the current passed through it.
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