MHT CET 2025 Physics question

PhysicsMoving Charges and MagnetismMHT CET 2025

A particle carrying a charge equal to 1000 times the charge on an electron, is rotating one rotation per second in a circular path of radius 'r' m. If the magnetic field produced at the centre of the path is x times the permeability of vacuum, the radius 'r' in m is [e = C] [x = ]

Answer: (D)

Solution

Charge C. One rotation per second gives an equivalent current A. Field at the centre of a circular loop:

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Question ID VK-100539