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प्रश्न
What is the self-inductance of a long air-core solenoid?
पर्याय
\[L=\frac{\mu_0n^2l}{A}\]
\[L=\mu_0nIAl\]
\[L=\mu_0n^2Al\]
\[L=\mu_0n^2IAl\]
MCQ
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उत्तर
Divide the total flux linkage \[\mu_0n^2IAl\] by current \[I\]. The current cancels, leaving \[L=\mu_0n^2Al\].
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