Impedeance of parallel RLC circuit

In summary, the parallel RLC circuit impedance is shown as attached. The equation above is the impedeance of RLC circuit in series, how can I convert that in parallel? Thanks.
  • #1
hidemi
208
36
Homework Statement
The impedance of the parallel RLC circuit shown is given by (as attached)
Relevant Equations
Z = [(R^2 + (XL - Xc)^2)]^1/2
the impedance of the parallel RLC circuit is shown as attached.
The equation above is the impedeance of RLC circuit in series, how can I convert that in parallel? Thanks.
 

Attachments

  • 1.jpg
    1.jpg
    27.2 KB · Views: 288
Physics news on Phys.org
  • #2
There are duality theorems in linear passive networks like this to literally convert them to a similar system with the same solution with the equivalent of variable substitutions (resistance becomes conductance, inductances becomes capacitance, current becomes voltage, etc.). BUT, it's kind of pointless to go that route for this sort of problem. You can just combine the impedances in parallel. Same as you would do for resistors, except the component values can be complex numbers. This is essentially an algebra problem.
 
  • #3
You can use the rule for parallel resistances for this case with the role of resistance played by the complex impedance so it will be . As I emphasized these are complex impedances , for example it will be however and . So you have to do algebra of complex numbers to find the complex and then your answer will be the modulus of Z, that is . (The modulus or magnitude of a complex number is the real number .)
 
  • Like
Likes hidemi
  • #4
Delta2 said:
You can use the rule for parallel resistances for this case with the role of resistance played by the complex impedance so it will be . As I emphasized these are complex impedances , for example it will be however and . So you have to do algebra of complex numbers to find the complex and then your answer will be the modulus of Z, that is . (The modulus or magnitude of a complex number is the real number .)
Thank you so much.
 
  • Like
Likes Delta2

Similar threads

Replies
21
Views
350
Replies
15
Views
5K
Replies
6
Views
2K
Replies
12
Views
6K
Replies
2
Views
1K
Replies
5
Views
2K
Replies
3
Views
2K
Replies
6
Views
452
Replies
6
Views
2K
Back
Top