Give the theory of moving coil galvanometer. how would you convert a galvanometer into a voltmeter.

Question: Give the theory of moving coil galvanometer. how would you convert a galvanometer into a voltmeter.

The moving coil galvanometer is based on the principle that when a current-carrying coil is placed in a magnetic field, it experiences a torque proportional to the current passing through it. This torque causes the coil to rotate, and the deflection is measured using a pointer attached to the coil. To convert a galvanometer into a voltmeter, a high resistance resistor is connected in series with the galvanometer. The resistance value of the resistor is chosen based on the maximum voltage to be measured, and the resulting combination is calibrated to display voltage readings directly. The resistance of the galvanometer should be much smaller than the resistance of the resistor to avoid affecting the circuit being measured.

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