If both the number of turns and core length of an inductor is doubled keeping other factorsconstant, then its self-inductance will be-
(i) Unaffected
(ii) doubled
(iii) halved
(iv) quadrupled
(ii) doubled
Explanation:
If both the number of turns and core length of an inductor is doubled keeping other factorsconstant, then its self-inductance will be doubled.
L=`\mu_{0}\frac{"N"^{2}}{l}"A"`
L'=`\mu_{0}\frac{("2N")^{2}}{2l}"A"`
=`2\mu_{0}\frac{"N"^{2}}{l}"A"`
= 2L
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