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Olympiad workbookNSEPMagnetic Effects of Current

A wire in the shape of a square frame carries a current I and produces a magnetic field B_ s at its centre. Now the wire is bent in the shape of a circle and carries the same current. If B_ c is the magnetic field produced at the centre of the circular coil, then B_s / B_c is

Options

  1. A8 ^2
  2. B8 ^2 / 2
  3. C8 2 / ^2
  4. D8 2

Correct answer

C. 8 2 / ^2

Step-by-step solution

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