- #1
zorro
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Homework Statement
A flat coil of area A and n turns is placed at the centre of a ring of radius r(r2>>A) and resistance R. The two are coplanar. When current in the coil increases from 0 to i, the total charge circulating in the ring is?
The Attempt at a Solution
dQ=dΦ/R
Initial flux = 0
How do I find out the final flux through the ring?