Explain about moving coil galvanometer
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Construction:
Construction of galvanometer is as shown in figure. In galvanometer, it consists of rectangular coil PQRS having N number of insulated copper coil which is wounded in the nonmagnetic metallic frame of soft iron as center core. The coil is suspended by a phosphor-bronze strip through a torsion head to that it is free to rotate about the vertical axis. The coil is placed in between two pieces of magnet. The other end of the coil is connected to the light spring and finally to the terminal T2 The torsion head is connected to the terminal T1. A concave mirror m is placed to the suspension strip to note the deflection of coil using lamp and scale arrangement.
Theory:
When a current I flows through the rectangular coil, the coil gets deflected, the suspension wire is twisted and rotating torque is developed on it. If k is rotating torque per unit angle per unit twist of the strip then restoring torque through the angle θ is
****see the file****
Construction of galvanometer is as shown in figure. In galvanometer, it consists of rectangular coil PQRS having N number of insulated copper coil which is wounded in the nonmagnetic metallic frame of soft iron as center core. The coil is suspended by a phosphor-bronze strip through a torsion head to that it is free to rotate about the vertical axis. The coil is placed in between two pieces of magnet. The other end of the coil is connected to the light spring and finally to the terminal T2 The torsion head is connected to the terminal T1. A concave mirror m is placed to the suspension strip to note the deflection of coil using lamp and scale arrangement.
Theory:
When a current I flows through the rectangular coil, the coil gets deflected, the suspension wire is twisted and rotating torque is developed on it. If k is rotating torque per unit angle per unit twist of the strip then restoring torque through the angle θ is
****see the file****
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