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प्रश्न
How does a magnetic core of relative permeability \[\mu_r\] change the solenoid self-inductance expression?
विकल्प
\[L=\frac{\mu_0n^2Al}{\mu_r}\]
\[L=\mu_0n^2Al+\mu_r\]
\[L=\mu_r\mu_0n^2Al\]
\[L=\mu_r\mu_0nIAl\]
MCQ
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उत्तर
For a magnetic core, relative permeability \[\mu_r\] multiplies the air-core expression. Thus \[L=\mu_r\mu_0n^2Al\].
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