Part a:Why are the phases across eachindividual component (capacitor, resistor, inductor) what theyare?
Advice: Â Â Â Â Â Â Â Â Â
for Ï• above, and consider it at theresonant frequency. (Or, equivalently, consider the phasor diagramat resonance; the phase shift Ï• is the same as the phase of thesignal in that diagram.) Â Â Â Â Â Â Â Â Â Â Â Â
Then, figure out how the differentcircuit components' phases should relate to Q(t)
, and thus how they relate to Ï•
. Â Â Â Â Â Â Â Â Â Â Â Â
You can also make a more physically-motivated explanation, basedon an intuitive analogy to mechanical resonance and simple harmonicoscillation (where \"pushing on a swing\" is a good picture). This isby no means required, though. Â Â Â Â Â Â Â Â Â
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Part B: Why is the voltage across theresistor what it is? Why is the voltage across theinductor-capacitor combination what it is? Â Â Â Â Â Â Â Â Â
Part C: Why are these notexactly what you would expect (theoretically-speaking)?(Hint: the phase of the L+C contribution may be a hint as to whatwe are neglecting.) Â Â Â Â Â Â Â Â Â
Part D: How can the voltage amplitudeacross the capacitor and inductor (individually) be larger than theinput voltage? Where does the energy come from?