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MHT CET Physics question

PhysicsMoving Charges and MagnetismMHT CET

A long solenoid is formed by winding 20 turns/cm. The current necessary to produce a magnetic field of 20 mT inside the solenoid will be approximately ( tesla m/A)

Answer: (A)

Solution

, $B=μ_0nI⇒

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Question ID VK-078309