When a current is passed through a suspended moving-coil galvanometer, the deflection of the coil is 9. Then, in the usual notation, the expression \(\frac{\mu B}{\theta}\) is
A. the torsion constant of the helical spring
B. the magnetic dipole moment of the current-carrying coil
C. the current through the coil
D. the torsion constant of the suspension fibre.
Answer:D
When a current is passed through a suspended moving-coil galvanometer, the deflection of the coil is 9. Then, in the usual notation, the expression \(\frac{\mu B}{\theta}\) is
A. the torsion constant of the helical spring B. the magnetic dipole moment of the current-carrying coil C. the current through the coil D. the torsion constant of the suspension fibre.