The discussion revolves around the uses of resistors and RC filters in advanced circuits, particularly focusing on their roles in controlling voltage and current, as well as their applications in filtering frequencies in AC circuits. Participants explore the implications of using resistors, the concept of voltage and current control, and the functionality of RC filters.
Participants express differing views on the utility of resistors, with some questioning their role and others affirming their importance in circuit design. The discussion on RC filters introduces additional complexity, with no consensus reached on the broader implications of resistor use.
Participants reference Ohm's law and the concept of voltage and current control, but there are unresolved questions about the practical implications of these concepts in circuit design. The discussion also touches on the limitations of resistors in achieving ideal circuit conditions.
This discussion may be of interest to students and professionals in electrical engineering, circuit design, and those exploring the theoretical and practical aspects of resistors and filtering techniques in circuits.
And how will you lower the voltage at different points in a circuit?.potatocar said:Why is this useful? If we want to decrease the current, why not just lower the voltage? Don't resistors just waste energy?
bp_psy said:And how will you lower the voltage at different points in a circuit?. .
Also notice that ohms law gives very high currents for very low resistances even if your voltages are low. Of course ohm law doesn't always hold but it still gives you a good idea
Yes the main use of resistors is voltage control and current control.potatocar said:So it's only because the same voltage supply is used for different "things" (that require different currents to flow through them)?
The current always decreases with increasing R. What I meant was that it would be very hard to adjust the current in a low resistance circuit just by adjusting the voltage. I edited that out because It might be confusing and maybe not a very useful way to think about it.potatocar said:Do you mean if R<1? So.. a resistor can increase the current?
potatocar said:I don't understand why we use resistors at all. I've read that they cause a voltage drop and decrease the flow of electrons (current). Why is this useful? If we want to decrease the current, why not just lower the voltage? Don't resistors just waste energy?