Question

A DMM is arragned at the magnetic pole of earth in $\tan A$ position. If a bar magnet is placed at some distance from the needle, deflection is

• A. $0^o$
• B. ${90}^o$
• C. ${45}^o$
• D. ${180}^o$

Answer 1

The correct option is C ${45}^o$

$Given:$ A DMM is arranged at the magnetic pole of earth in $tanA$ position.

$Solution:$ $S_H\tan \theta =\frac{2\mu mM}{4\pi d^3}$

as distance is less

and $B_H$ is very less.

$\theta ={90}^o$

A DMM is arranged at the magnetic pole of earth in tan A position. If a bar magnet is placed at some distance from the needle, deflection is ${90}^{\circ }.$

$So,the$ $correct$ $option:B$