A solenoid can be treated as an (R L) series circuit. If such a solenoid driven by

Question:

A solenoid can be treated as an $R L$ series circuit. If such a solenoid driven by a $60-\mathrm{Hz}, 15-\mathrm{V}$ AC source has an inductance of $6.0 \mathrm{mH}$ and a resistance of $3.0 \Omega$, what are the phase constant and the current amplitude?

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