Question

In a tangent galvanometer, the magnetic induction produced by the coil of wire situated in the magnetic meridian is found to be equal to the horizontal component of the earths magnetic field. The deflection produced in it will be

• A. ${30}^o$
• B. ${60}^o$
• C. ${45}^o$
• D. ${90}^o$

Answer 1

Answer: (C)

${45}^o$

$B_4\tan \theta =B$ produced by coil
$B_4\tan \theta =B_4$
$\tan \theta =1$
$\theta ={45}^o$