MHT CET 2026 Physics question
A current carrying circular coil of radius 'R' produces magnetic field B at an axial point P at a distance 'x' from its centre and B at point Q placed at its centre respectively (x << R). If B = 8B, the value of x is
Answer: (B)
Solution
Field on the axis of a circular coil: . Field at the centre: . Then , so , i.e. . Thus and $x =
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