Question

If the number of turns in a coil becomes doubled
then its self inductances will be:
(a) unchanged (b) four times
(c) halved (d) doubled

Answer 1

Answer:

b four times

Explanation:

because formula for self inductance is u×number of turns square ×area /length

hence when turns doubled inductance get four times

Answer 2

Answer:

if the no. of turns in a coil becomes doubled then it's self inductances will be four times..