# Solve for RL circuit

Discussion in 'Homework Help' started by pokkedief, Jul 24, 2011.

1. ### pokkedief Thread Starter New Member

Jul 24, 2011
2
0
I am completely lost with this AC question. Determine the value of Ls and Lp, equivalent frequency of 250k rad/s Rs = 300 ohms Rp = 600 ohms i am completely confused someone help me please. [/URL]

Last edited: Jul 24, 2011
2. ### blah2222 Distinguished Member

May 3, 2010
581
38
I am assuming there are two cases where a resistor is in series with an inductor as well as the case where it is in parallel with an inductor.

3. ### pokkedief Thread Starter New Member

Jul 24, 2011
2
0
i posted the picture of the circuit.

4. ### blah2222 Distinguished Member

May 3, 2010
581
38
Okay so what this question is asking you is: At what values of Ls and Lp will both circuits have the same impedance value at 250 krad/s?

One is a series circuit and the other is a parallel circuit. Both impedances will be the same, and operate at the same frequency. Start by writing out the equations for both impedances and equate them.

5. ### narasimhan Member

Dec 3, 2009
72
6
use this formula
Rs+jwLs=(Rp)(jwLp)/(Rp+jwLp)