An RLC series circuit contains an AC source of emf for which \(\mathscr{E}_{\max }=30.0 \mathrm{~V}\), a \(5.00-\Omega\) resistor, a \(4.00-\mathrm{mH}\) inductor, and an \(8.00-\mu \mathrm{F}\) capacitor. What are \((a)\) the resonant angular frequency and \((b)\) the current amplitude if it is driven at the resonant angular frequency? (c) If a \(1.00-\mathrm{kHz}, 30. 0-\mathrm{V}\) source is used, what is the current amplitude?