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MHT CET Physics question

PhysicsMagnetism and MatterMHT CET

Not in JEE Advanced syllabus

Magnetic induction at a point P on the axis is 4 times the magnetic induction at a point Q on the equator of a short magnetic dipole. P is at 10 cm from the centre of dipole. Distance of Q from centre of dipole is

Answer: (C)

Solution

gives , so

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Question ID VK-080388