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Q.

Mutual inductance M between two concentric coils of radii 1m and 2m is

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a

$\frac{μ_{0} π}{8}$

b

$\frac{μ_{0} π}{2}$

c

$\frac{μ_{0} π}{4}$

d

$\frac{μ_{0} π}{10}$

answer is B.

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Detailed Solution

$M = \frac{\frac{μ_{oI}}{2 R_{2}} [{πR}_{1}^{2}]}{I}; M = \frac{μ_{o} {πR}_{1}^{2}}{2 R_{2}} = μ_{o} \frac{π}{4}$

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