# RL Circuit Applications

1. Jan 14, 2008

Can someone explain to me 2 basic applications of RL circuits? What are they used for and some examples, please. I'm quite confused. It doesn't take much.

2. Jan 15, 2008

### Staff: Mentor

Welcome to the PF, maddyfan811. We are happy to provide tutorial help, as long as you tell us what you know so far, and what your thoughts are. So, what is special about inductors? What are they used for? How do they store energy? Do you know the differential equation for inductors that relates the V(t) across them to the I(t) through them?

If you can provide us with what you know so far about inductors, we can talk a little about why you would combine inductors and resistors in circuits....

3. Jan 15, 2008

### grafica

hai
i too need the answer for the application of rl ckts.
they store energy in the form of magnetic field.
whenever current flows through the coil,lines of magnetic flux are generatedaround it .
this magnetic flux opposes changes in the current due to induced emf.that component is inductors

4. Jan 15, 2008

### Staff: Mentor

Good start. Wonder if you two are in the same class? Anyway, the best next thing to discuss is the relationship between V(t) across the elements, and the resulting I(t) that flows through each. What is the relationship for V(t) versus I(t) for a resistor? What about for an inductor?

5. Jan 15, 2008