The magnetic needle of a tangent galvanometer is deflected at an angle $30^o$ due to a magnet. The horizontal component of the earth's magnetic field is $0.34 \times 10^{-4}\, T$ which is along the plane of the coil. The magnetic field due to magnet is
The magnetic needle of a tangent galvanometer is deflected at an angle $30^o$ due to a magnet. The horizontal component of the earth's magnetic field is $0.34 \times 10^{-4}\, T$ which is along the plane of the coil. The magnetic field due to magnet is
- A
$1.96 \times {10^{ - 4}}\,T$
- B
$1.96 \times {10^{ - 5}}\,T$
- C
$1.96 \times {10^{ 4}}\,T$
- D
$1.96 \times {10^{ 5}}\,T$
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