RC and RL Circuits. 1 st Order Circuits. Objective of the Lecture. Explain the transient response of a RC circuit As the capacitor stores energy when there is: a transition in a unit step function source, u(t-t o ) or a voltage or current source is switched into the circuit.
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1st Order Circuits
Also known as a forced response to an independent source
IC = 0A when t < to
VC = 0V when t < to
Because I1 = 0A (replace it with an open circuit).
of the voltage across the
circuit and determine the
voltage across the terminal.
IC = 0A when t ~ ∞ s
VC = VR = I1R when t ~ ∞ s
In the time between to and t = ∞ s, the capacitor stores energy and currents flow through R and C.
When a voltage or current source changes its magnitude at t= 0s in a simple RC or RL circuit.
Equations for a simple RC circuit
Equations for a simple RL circuit
Needed to Complete HW # 21
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