Energy Stored in Different Coils#

Solenoid \(A\) is tightly wound while solenoid \(B\) has windings that are evenly spaced with a gap equal to \({\rm {{ params_num }}} d\), where \(d\) is the diameter of the wire. The solenoids are otherwise identical.

Question Text#

Determine the ratio of the energies stored per unit length of these solenoids when the same current flows through each.

Answer Section#



\(E_B/E_A =\) .


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