An air cored coil has a self inductance of 0.1 H. A soft iron core of relative permeability 1000 is th introduced inside cored coil and number of turns reduced to (1/10). The value of self inductance now becomes (a) 1 mH (b) 10 mH (c) 1 H (d) 10 H

Answer: (c). For a coil L = (μr μ₀ N² A)/(l), so L ∝ μr N². L' = 0.1 × 1000 × (1/10)² = 0.1 × 10 So the answer is (c) 1 H.

An air cored coil has a self inductance of 0.1 H. A soft iron core of… | MHT CET 2026 (13 May, Shift 1)

Q13MHT CET 2026 · 13 MAY · SHIFT 1Medium

Self-Inductance & Energy

An air cored coil has a self inductance of $0.1$ H. A soft iron core of relative permeability $1000$ is $\text{th}$

introduced inside cored coil and number of turns reduced to $\left(\frac{1}{10}\right)$ . The value of self inductance now becomes

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Answer: (c)