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Physics view of passive electronic components
Resistor: under a forced response, a voltage is instantly placed across a resistor, and current immediately flows.
Capacitor: under a forced response, the voltage across a capacitor cannot change instantly, and essentially acts as a short. At time zero (or t = 0), the voltage is zero. current at time zero (t = 0), is also zero.
Inductor: under a forced response, an inductors voltage can change instantly, but the current at time zero (t = 0) is zero.
t=0 (time zero) is when the circuit is first energized.
A forced response is a switch of some kind being thrown to energize a circuit.
Why would you need to know a physics view of a circuit?
Because to solve differential equations (like in transient circuits) you have to know initial conditions, which can be figured out by looking at the circuit in a physics point of view.
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