Physics · Magnetic Effects of Current
A square frame of side 'L' carries a current I. The magnetic field at its centre is B. The same current is passed through a circular coil having the same perimeter as the square frame. If the magnetic field at the centre of the circular coil is B′, then the ratio BB′ is:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 14√2π2
- 28√2π
- 38√2π3
- 48√2π2✓
Correct answer
8√2π2
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