Extra exam question E5A01

WhyResonance can cause the voltage across the reactances in a series RLC circuit to exceed the voltage applied to the whole circuit. At resonance, an ideal series RLC circuit's inductive and capacitive reactances are equal in magnitude and cancel each other in the overall impedance, but each one individually can still be large, so the voltage developed across the inductor or capacitor alone, current times that large individual reactance, can end up considerably higher than the voltage applied to the whole circuit, a voltage-magnification effect tied directly to resonance, answer A. Capacitance and resistance alone don't produce this magnification, and a low Q actually reduces it rather than causing it.