If current of 4 A produces magnetic flux of 3 × 10⁻³ Wb through a coil of 400 turns, the energy stored in the coil will be (a) 1.2 J (b) 2.4 J (c) 24 J (d) 240 J

Answer: (b). L = (Nφ)/(I) = 400×3×10⁻³4 = 0.3 H U = 12 L I² = 12×0.3×16 = 2.4 J So the answer is (b) 2.4 J.

If current of 4 A produces magnetic flux of 3 × 10⁻³ Wb through a… | MHT CET 2026 (18 Apr, Shift 2)

Q11MHT CET 2026 · 18 APR · SHIFT 2Easy

Self-Inductance & Energy

If current of 4 A produces magnetic flux of $3 \times 10^{-3}$ Wb through a coil of 400 turns, the energy stored in the coil will be

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Answer: (b)

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