How are magnets used in a voltmeter?
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The galvanometer has a coil of fine wire suspended in a strong magnetic field. When an electric current is applied, the interaction of the magnetic field of the coil and of the stationary magnet creates a torque, tending to make the coil rotate.
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N and S are the north and south poles of the magnet . A moving coil galvanometer can be used as a voltmeter by inserting a resistor in series with instrument
Explanation:
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