Circuit analysis complex numbers

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SUMMARY

The discussion focuses on circuit analysis using complex numbers, specifically the calculations of impedance for capacitors, inductors, and resistors. The participant calculated the impedance for a capacitor as Zcapacitor = -j1.667*10^3 and for an inductor as Zinductor = j0.6. The combined impedance Z1 for a capacitor and resistor was determined to be Z1 = 2 - j1.667*10^3, and the parallel impedance Z12 with a 22-ohm resistor was calculated as Z12 = 21.99 - j0.2903. The final impedance Z123, which includes the inductor in series, was computed as Z123 = 21.99 + j0.309.

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  • Understanding of complex numbers in electrical engineering
  • Knowledge of impedance calculations for capacitors, inductors, and resistors
  • Familiarity with series and parallel circuit configurations
  • Ability to convert frequency from Hz to rad/sec
NEXT STEPS
  • Study the application of the formula Zcapacitor = 1/(jwC) in different circuit scenarios
  • Learn about the effects of frequency on impedance in AC circuits
  • Explore advanced techniques for analyzing circuits with multiple components
  • Investigate the use of phasors in circuit analysis for simplifying calculations
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Electrical engineering students, circuit designers, and anyone involved in analyzing AC circuits using complex numbers.

x86
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Homework Statement


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I'm going crazy. I've done this problem nearly 20 times and keep getting the same answer. I've read my textbook so many times too! What am I doing wrong?

Homework Equations


Zcapacitor = 1/(jwC)
Zinductor = jwL
Zresistor = R

The Attempt at a Solution



Z for the capacitor -j1.667*10^3
Z for the inductor is j0.6

Z1 contains the capacitor and resistor on the righthand side of the circuit

Z1 = 2 - j1.667*10^3

Calculate Z12 (Z1 in parallel with the 22 ohm resistor)

1/Z12 = 1/22 + (2+j1.667*10^3)/(2.78*10^6)
Z12 =21.99-j2.903*10^-1

Z123 = Z12 in series with the inductor = 21.99 - j0.2903 + j0.6 = 21.99 + j0.309
 
Physics news on Phys.org
Don't forget to convert simple frequency f, which has units of Hz, to radial frequency ω, which has units of rad/sec.
 
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collinsmark said:
Don't forget to convert simple frequency f, which has units of Hz, to radial frequency ω, which has units of rad/sec.

Such a simple mistake on my part. Thanks.
 

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