The discussion centers on the behavior of current in an R-L circuit when subjected to a DC voltage source. It is established that the current cannot change instantaneously through an inductor unless an impulse voltage source is applied. The participants clarify that at time t=0+, the rate of change of current (di/dt) is not zero due to the presence of voltage across the inductor, which contradicts the initial assumption. The use of Laplace transforms and source transformation techniques is highlighted as effective methods for analyzing the circuit's behavior.
PREREQUISITESElectrical engineering students, circuit designers, and anyone interested in understanding transient responses in R-L circuits.
It's probably a typo. They meant Is instead of Ls.jaus tail said:
No.jaus tail said:
Well, if you use source transformation, you end up with a series RL circuit with Rtotal=Rs+R and inductance L, excited by a voltage source of emf IsRs.jaus tail said:
No, here VL at t=0 is not zero, hence di/dt is also not zero. You can't compare the currents at t=0- and t=0+ to find di/dt at t=0+ because at t=0-, the inductor was not excited.jaus tail said:
