For the image above, when t<0, howcome it's safe to ignore the loop with the 50V source, and the 60 and 200 ohm resistors?
How do you know when you can ignore a loop, or when to ignore a part of a circuit due to short/open circuit?
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Sign up to join this communityFor the image above, when t<0, howcome it's safe to ignore the loop with the 50V source, and the 60 and 200 ohm resistors?
How do you know when you can ignore a loop, or when to ignore a part of a circuit due to short/open circuit?
You can ignore the loop because it's only connected to the rest of the circuit at a single point or electrical node. For anything to be considered "part" of a circuit it must connect two DIFFERENT nodes.
This applies if there is no inductive high voltage contact arc across the contacts as it moves from one contact to the next. So on old distributor caps they were very far apart to each plug wire. Otherwise assume the “pole” opens, Briefly between “throws”. As in a SPDT switch shown here.