A tangent galvanometer has a coil with 50 turns and radius equal to 4 cm. A current of 0.1 A is passing through it. The plane of the coil is set parallel to the earth's magnetic meridian. If the value of the earth's horizontal component of the magnetic field is \[7\times {{10}^{-5}}\]tesla and\[{{\mu }_{0}}=4\pi \times {{10}^{-7}}weber/amp\times m\], then the deflection in the galvanometer needle will be [MP PMT 1993]

A tangent galvanometer has a coil with 50 turns and radius equal to 4

1.	A tangent galvanometer has a coil with 50 turns and radius equal to 4 cm. A current of 0.1 A is passing through it. The plane of the coil is set parallel to the earth's magnetic meridian. If the value of the earth's horizontal component of the magnetic field is \[7\times {{10}^{-5}}\]tesla and\[{{\mu }_{0}}=4\pi \times {{10}^{-7}}weber/amp\times m\], then the deflection in the galvanometer needle will be [MP PMT 1993]
A.	45o
B.	48.2o
C.	50.7o
D.	52.7o
Answer» C. 50.7o