defence exam Agniveer Vayu Group X & XY Mock Test 01/2026 Physics Electromagnetic Induction and Inductance Faraday’s Law of Induction
Determine the self inductance per unit length of a long solenoid with radius R and n turns per unit length.
1
\( \boxed{\mathcal{L} = \mu_0 n \pi R^2}\)
2
\( \boxed{\mathcal{L} = \mu_0 n^2 \pi R^2}\)
3
\( \boxed{\mathcal{L} = \mu_0 n^2 \pi R}\)
4
\( \boxed{\mathcal{L} = \mu_0 n \pi R}\)