Is there any difference between RL vs LR circuit? Which one is for low-pass/high-pass filter?
Really? But RC and CR are different, RC is a low-pass filter and CR is a high-pass filter.
These filters work by potential divider action. We can have series R and shunt L, giving high pass action, or the converse. We can also connect the filter either way round. It is important to consider the impedance (usually resistance) of the source and the load, so that we are considering the full circuit.why can I only find references to RL and not LR ?
do you have any references please?
Frankly, I would not make any assumption about the actual layout of an LR or and RL circuit, if there was no information provided about how it has been connected. Wait till you see the circuit diagram and then you have a chance.RL is high pass, LR is low pass. Brevity for its own sake is generally discouraged.
Personally, I wouldn't want to get involved in a system that appears to force a reader into such a bad choice with such open ended assumptions. The only thing one could say about RL or LR would be that the associated time constants would be the same. (Same comment for RC and CR)in light of the answer options being given.
It shows that 'the system' actually has a certain amount of sense, perhaps.why can I only find references to RL and not LR ?