NEET PhysicsClass 12Self-inductance and magnetic energyMediumSingle correct

An air-cored solenoid 40 cm long has 400 turns and a cross-sectional area of 5.0 cm². How much magnetic energy is stored in it when it carries a steady current of 3.0 A? (μ₀ = 4π × 10⁻⁷ T m A⁻¹)

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An air-cored solenoid 40 cm long has 400 turns and a cross-sectional area of 5.0 cm². How much magnetic energy is stored in it when it carries a steady current of 3.0 A? (μ₀ = 4π × 10⁻⁷ T m A⁻¹)

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