Magnetism: Magnetic Field Inside Conductor MCQ

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Magnetic Field Inside ConductorMediumQuestion 20194

Question

Magnetic field at a point inside a solid cylindrical conductor of radius R at distance r < R from axis is:

μ₀Ir/2πR²

For r < R, enclosed current = I(r²/R²). Applying Ampere's law: B(2πr) = μ₀I(r²/R²) → B = μ₀Ir/(2πR²). Field increases linearly from axis to surface.