For a moving coil galvanometer, the deflection in the coil is 0.05 rad when a current of 10 mA is passed through it. If the torsional constant of suspension wire is 4.0 x 10 -5 Nm rad -1 , the magnetic field is 0.01 T and the number of turns in the coil is 200, the area of each turn (in cm 2 ) is:
Text Solution
Verified by ExpertsThe correct answer is:
B
NiAB = K 
On solving A = 10 -4 m 2 = 1 cm 2
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