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Two concentric circular coils of radius ...

Two concentric circular coils of radius `r` and `R` are placed coaxially with centres coinciding If `R gt gt r` then calculate the mutual inductance the coils.

Text Solution

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let `a` current `i` flow in coil of radius `R (R gt gt r)`
Magnetic field at the centre of coil =`(mu_(0)i)/(2R)pir^(2)`
or `Mi=(mu_(0)i)/(2R)pir^(2)` or `M=(mu_(0)pir^(2))/(2R)`
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