Alternating current peak value

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SUMMARY

The discussion focuses on calculating the peak current delivered by a source in a parallel AC circuit containing an inductor (L), capacitor (C), and resistor (R). The peak currents are given as 2mA for the inductor, 3mA for the capacitor, and 5mA for the resistor. The participant attempted to use Ohm's Law and the relationships between current and voltage for each component but faced issues with the calculations. The key takeaway is the importance of considering phase relationships between the currents, particularly how the inductor current lags and the capacitor current leads relative to the resistor current.

PREREQUISITES
  • Understanding of AC circuit theory
  • Familiarity with Ohm's Law and admittance calculations
  • Knowledge of phase relationships in AC circuits
  • Basic skills in using scientific calculators for trigonometric functions
NEXT STEPS
  • Study the concept of impedance in AC circuits
  • Learn about phasor diagrams and their application in circuit analysis
  • Explore the calculation of total current in parallel AC circuits
  • Investigate the effects of phase angles on circuit behavior
USEFUL FOR

Electrical engineering students, circuit designers, and anyone involved in analyzing or designing AC circuits will benefit from this discussion.

erisedk
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Homework Statement


If the peak values of current through inductor (L), capacitor (C) and resistor (R) in parallel AC circuit are 2mA, 3mA, and 5mA respectively, then the peak value of current delivered by the source in the same circuit will be

Homework Equations

The Attempt at a Solution


i (R) = V/R or i (L) = V/wL or i (C) = VwC
Using this, I found out R, wL and wC.
Next, I found admittance.
But the answer wasn't in any of the options.
I don't know what to do next.
 
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Consider the phase relationships between the given currents. Taking the resistor current as reference, does the inductor current lead or lag? By what angle? How about the capacitor current?
 
I was actually doing it right, just entering a number wrong repeatedly into my calculator.
gneill said:
Consider the phase relationships between the given currents. Taking the resistor current as reference, does the inductor current lead or lag? By what angle? How about the capacitor current?
Yeah, I did.
Thank you very much.
 

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