A moving coil galvanometer has 50 turns and each turn has an area . The magnetic field produced by the magnet inside the galvanometer is . The torsional constant of the suspension wire is . When a current flows through the galvanometer, a full scale deflection occurs if the coil rotates by . The resistance of the coil of the galvanometer is . This galvanometer is to be converted into an ammeter capable of measuring current in the range . For this purpose, a shunt resistance is to be added in parallel to the galvanometer. The value of this shunt resistance, in ohms,is…..
N = 50 turns A= B=0.02 T
=0.2 rad =0-1.0A
So , BINA=
=0.1A
For galvanometer, resistance is to be connected to ammeter in shunt.
The resistance to be connected in parallel to ammeter.
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