A) remains same
B) becomes \[2L\] henry
C) becomes \[4L\] henry
D) becomes \[\frac{L}{\sqrt{2}}\] henry
Correct Answer: C
Solution :
The self-inductance \[(L)\] of a coil having \[N\]number of \[t.3urns\] is given by \[L=\frac{{{\mu }_{0}}{{N}^{2}}A}{l}\] \[\Rightarrow \] \[\frac{{{L}_{1}}}{{{L}_{2}}}=\frac{N_{1}^{2}}{N_{2}^{2}}\] Given,\[{{L}_{1}}=L,\,\,{{N}_{1}}=N,\,\,{{N}_{2}}=2N\] \[\therefore \] \[{{L}_{2}}=4L\]
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