a rectangular coil of area 0.0005 metersquare is free to rotate about one of its vertical sides,the coil has 90 turns and is in a radial horizontal field of 60*10^-4 T . if a current of 0.20*10^-3 produces a deflection of pie/10 radians , calculate the torsional constant for the coil.

Dear Student ,
As we know that ,

torsional constant ,k=nBIA α=90×60×10-4×0·2×10-3×0·000518°=3·0×10-9 Nm per degree
Regards

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