MCQ
Two circular coils have their centres at the same point. The mutual inductance between them will be maximum when their axes
- ✓Are parallel to each other
- BAre at $60^o$ to each other
- CAre at $45^o$ to each other
- DAre at $90^o$ to each other
✓
Answer
Correct option: A.
Are parallel to each other
a
Given,
Given,
Two circular wils having centers at same point.
Since mutual inductance between two coils is given by formula,
$M_{12} =\frac{N_2 \phi_{12}}{I_1}$
$=\frac{N_2(B A \cos \theta)}{I_1}$
$\therefore M_{12}$ will be maximum when $\cos \theta=1$ , i.e $\theta=0^{\circ}$ (when two coils are parallel)
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