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MHT CET Physics question

PhysicsMoving Charges and MagnetismMHT CET

A long solenoid of length L has a mean diameter D. It has n layers of windings of N turns each. If it carries a current 'I', the magnetic field at its centre will be

Answer: (C)

Solution

For a long solenoid , which has no diameter term, and it varies

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Question ID VK-078578