AP Physics C: E&M
13.4 Inductance
An ideal long cylindrical solenoid with length \(\ell\), circular cross section of radius \(r\), and total number of turns \(N\) has a self-inductance \(L\). A second ideal long cylindrical solenoid is constructed with length \(2\ell\), radius \(2r\), and total number of turns \(2N\). What is the self-inductance of the second solenoid?
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