If the number of turns per unit length of a coil of solenoid... | Physics | SolveeIt | Solveeit

Today, August 18

Question

If the number of turns per unit length of a coil of solenoid is doubled, the self-inductance of the solenoid will

A

remain unchanged

B

be halved

C

be doubled

D

become four times

Answer

become four times

Explanation

Solution

Self inductance of a solenoid $=\mu_0 n^2 Al$
where n is the number of turns/length.
So self induction $\mu_0 n^2$
So inductance becomes 4 times when n is doubled.