Self inductance of a solenoid cannot be increased by (a) decreasing its length (b) increasing its area of cross-section (c) increasing the current through it (d) increasing the number of turns in it

Answer: (c). L = (μ₀ N² A)/(l) depends only on geometry and the medium. Decreasing l, increasing A or increasing N all raise L; the current does not appear in the formula. So the answer is (c) increasing the current through it.

Self inductance of a solenoid cannot be increased by | MHT CET 2022 (11 Aug, Shift 2)

Q64MHT CET 2022 · 11 AUG · SHIFT 2Easy

Self-Inductance & Energy

Self inductance of a solenoid cannot be increased by

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Answer: (c)

$L = \dfrac{\mu_0 N^2 A}{l}$ depends only on geometry and the medium.
Decreasing $l$ , increasing $A$ or increasing $N$ all raise $L$ ; the current does not appear in the formula.
So the answer is (c) increasing the current through it.

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