working of a galvanometer
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a galvanometer is a electromechanical instrument used for detecting and indicating an electric current. A galvanometer works as an actuator, by producing a rotary deflection (of a "pointer"), in response to electric current flowing through a coil in a constant magnetic field.
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a work of and galvanometer measure is used when we want to delete the presence of very weak current in an electric current or to know only the direct and flow
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