Two identical coils each of self-inductance \( \mathrm{L} \), are connected in series and are pl....

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Two identical coils each of self-inductance \( \mathrm{L} \), are connected in series and are placed so close to each
\( \mathrm{P} \)
other that all the flux from one coil links with the
W
other. The total self-inductance of the system is:
(1) \( \mathrm{L} \)
(2) \( 2 \mathrm{~L} \)
(3) \( 3 \mathrm{~L} \)
(4) \( 4 \mathrm{~L} \)


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