A) half
B) double
C) 1/4 times
D) quadruple
Correct Answer: D
Solution :
For a solenoid of length\[l,\] area of cross-section A, having N closely wound turns, the self inductance of the solenoid is \[L=\frac{{{\mu }_{0}}{{N}^{2}}A}{l}\] When N? = 2N Hence, when number of turns is doubled then self inductance becomes quadruple.
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