A moving coil galvanometer has a coil with 175 turns and area \( 1 ...

A moving coil galvanometer has a coil with 175 turns and area \( 1 \mathrm{~cm}^{2} \). It uses
a torsion band of torsion constant
P
\( 10^{-6} \mathrm{~N}-\mathrm{m} / \mathrm{rad} \). The coil is placed in a magnetic field \( B \) parallel to its plane. The coil deflects by \( 1^{\circ} \) for a current of \( 1 \mathrm{~mA} \). The
W value of \( B \) (in Tesla) is approximately (2019 Main, 9 April II)
(a) \( 10^{-3} \)
(b) \( 10^{-4} \)
(c) \( 10^{-1} \)
(d) \( 10^{-2} \)