MHT CET 2022 Physics question
A rectangular coil of effective area 0.05 m is suspended freely in a radial magnetic field of 0.01 Wb/m. The torsional constant of the suspension fiber is 5 x 10 Nm/degree. If a current of 300 A passed through it, then the angle through which the coil rotates is
Answer: (B)
Solution
In a radial field (moving-coil galvanometer) the deflecting torque is balanced by the restoring torque . So . With effective area m, A, Wb/m: $NIAB =
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