Question 306: Electromagnetic Induction

Question

Self inductance of a solenoid cannot be increased by

Accepted Answer

The self inductance of a solenoid is given by
$$\mathrm{L}=\frac{\mu_0 \mu_{\mathrm{r}} \cdot \mathrm{N}^2 \mathrm{~A}}{l}$$
L depends upon $$\mathrm{N}, \mathrm{A}$$ and $$l$$. It does not depend upon the current flowing through it. Change in current does not affect $$\mathrm{L}$$.

Answer

decreasing its length

Answer

increasing its area of cross-section

Answer

increasing the current through it

Answer

increasing the number of turns in it

Electromagnetic Induction

Self inductance of a solenoid cannot be increased by

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