Problem C6:
In the figure above there are two concentric circular loops of wire that lie in the same plane.
The larger loop has n_{1} turns of wire, and has a radius of n_{2} meters.
The smaller loop has two loops of wire, and an area of 0.1 m^{2}. What is the
mutual inductance M of the two wires? If M = n_{3} μ_{0}, what is
n_{3}?

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