Two semicircular rings lying in same plane

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Two semicircular rings lying in same plane, of uniform linear charge density `lambda` have radius r and 2r. They are joined using two straight uniformly charged wires of linear charge density `lambda` and length r as shown in figure. The magnitude of electric field at common centre of semi circular rings is –
15
Sep
Two semicircular rings lying in same plane, of uniform linear charge density `lambda` have radius r and 2r. They are joined using two straight uniformly charged wires of linear charge density `lambda` and length r as shown in figure. The magnitude of electric field at common centre of semi circular rings is – 2q 3q [...]
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