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Magnetic field intensity H at the centre of a long solenoid with n turns per unit length

The same question, asked 2 times: 25 Apr 2025 S1*, 16 Apr 2026 S2. Every wording below, oldest first.

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  1. Question 1

    25 Apr 2025 S1

    11
    The magnetic field intensity H at the center of a long solenoid having nn turns per unit length and carrying a current I, when no material is kept in it is ( μ0=\mu_{0}= permeability of free space)

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  2. Question 2

    16 Apr 2026 S2

    131
    The magnetic field intensity (H) at the centre of a long solenoid having 'n' turns per unit length and carrying a current I, when no material is kept in it is (μ0\mu_0 = permeability of free space)

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