Maximal power input occurs exactly at resonance and explains drive behavior

Evidence

Figure 10.4 confirms that the power input by the drive is maximal on resonance. This maximum power principle of resonance is useful because it can be used to figure out what happens on resonance sometimes just by asking, what situation would cause the drive to exert the most power? The maximum power principle also follows from the definition of resonance, since constructive addition of amplitude will raise the energy of the system, energy that must be supplied by the drive. — Eric J. Heller, Why You Hear What You Hear- An…, 995

Categorization

• QUESTION: The heuristic — ‘what would cause the drive to exert the most power?’ — is a reasoning shortcut for solving resonance problems without calculation.