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MHT CET Physics question

PhysicsMoving Charges and MagnetismMHT CET

There are 50 turns of a wire in every cm length of solenoid. If 4 A current is flowing in the solenoid, the approximate value of magnetic field of axis at an internal point and at one end will be respectively in

Answer: (C),(D)

Solution

, so inside and at an end 10^{-3}$\

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Question ID VK-078327