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Total impedance of rl circuit 
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#1
Dec3010, 04:40 AM

P: 14

1. The problem statement, all variables and given/known data
find total impedance of a circuit with R1 and L in parallel with R2. circuit looks like this (but with R2 instead of C): http://wpcontent.answcdn.com/wikiped...rallel.svg.png 2. Relevant equations formula for two components in parallel: [tex]Z_T = Z_1 Z_2/(Z1 + Z_2)[/tex] 3. The attempt at a solution question is, can I first combine the two resistors in parallel, then add the inductor in series? Or must I do the inductor and R1 together, in parallel with R2? So, eith er R1R2 + Z_L or (R1+Z_L)R2 ? I'm assuming the last one? 


#2
Dec3010, 05:23 AM

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PF Gold
P: 11,773

Yes, the latter.



#3
Dec3110, 10:22 PM

P: 6

The two series impedances are both, as a combined single impedance, in parallel with the last impedance. That is why vela and yourself are both correct.



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