Impedance as seen across two terminals

  • Thread starter Thread starter anthonych414
  • Start date Start date
  • Tags Tags
    Impedance
AI Thread Summary
The discussion revolves around calculating the impedance between terminals 'ab' in a circuit with specified inductances, resistances, and capacitances. The correct impedance is stated as 27 + j9, but the user consistently arrives at a different result of 540/37 + 90j/37 Ω. Participants suggest that the user's calculations may be accurate and question whether the component values in the problem statement were altered without updating the answer. The conversation highlights the importance of verifying component values in circuit problems. Ultimately, the user's confusion stems from a potential discrepancy in the provided values versus the expected answer.
anthonych414
Messages
86
Reaction score
0

Homework Statement



All the inductances in Figure P8.2.10 are j10, all the resistances are 10, and all the capacitances are -j12 . Determine the impedance between terminals 'ab'.

Ans. 27 + j9

Homework Equations





The Attempt at a Solution



I figured I should add up the impedances of the capacitors on the left and divide by 2, doing the same for the inductors and the resistors, then finding the equivalent impedance of the parallel connection of the resistors/inductors/capacitors. I keep getting an answer of 540/37 + 90j/37 Ω. Any idea what I might be doing wrong?
 

Attachments

  • pf.png
    pf.png
    5.3 KB · Views: 499
Physics news on Phys.org
Your answer looks correct to me. Maybe they changed component values in the question but didn't update their answer.
 
Your solution looks correct.


ehild
 
Thread 'Collision of a bullet on a rod-string system: query'

Thread 'Collision of a bullet on a rod-string system: query'

In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
View full post »
Thread 'A cylinder connected to a hanged mass'

Thread 'A cylinder connected to a hanged mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
View full post »

Similar threads

Impedance of circuit (R, L in series. C in parallel)
Replies
5
Views
3K
Change in Capacitor for largest possible Current
Replies
2
Views
1K
The potential difference across an inductor
Replies
9
Views
10K
How Do You Calculate Impedance for Series and Parallel RLC Circuits?
Replies
1
Views
10K
How Does Frequency Affect Impedance in a Parallel RLC Circuit?
Replies
3
Views
2K
Frequency of circuit with purely real impedance
Replies
14
Views
7K
AC voltage across a parallel branch
Replies
5
Views
2K
The relationship of the current before and after a change.
Replies
16
Views
2K
Find the equivalent impedance of an infinite series of resistors and capacitors
Replies
5
Views
4K
What Happens When ω²LC=1 in an RLC Circuit?
Replies
3
Views
1K

Hot Threads

Recent Insights

Back
Top