Calculating Voltage Across Capacitor Using Node Method and Phasors

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    Capacitor Voltage
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To calculate the voltage across the capacitor (va) using the node method and phasors, it is essential to perform nodal analysis by labeling the nodes and applying Kirchhoff's Current Law (KCL) with Ohm's law. The relationship va = (v1 - v2)/Zc is incorrect, as the units for this equation yield amperes rather than volts. Instead, va should simply be expressed as v1 - v2, which directly represents the voltage difference between the two nodes. It is crucial to show the equations and work to validate the calculations. Understanding these principles will enhance the learning process in circuit analysis.
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i am trying to find va in the circuit below

i am using the node method via phasors and am wondering is va = (v1 - v2)/Zc??

where v1 is the node voltage between the 1/2 F capacitors on the left and v2 is the node voltage between the 1/2 F capacitors on the right

or is it just equal to v1 - v2?

thanx
 
Last edited:
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magnifik said:
i am trying to find va in the circuit below (it is kind of blurry, but va is the voltage between the terminals in the middle 1/2 F capacitor)
5foxhf.png


i am using the node method via phasors and am wondering is va = (v1 - v2)/Zc??

where v1 is the node voltage between the 1/2 F capacitors on the left and v2 is the node voltage between the 1/2 F capacitors on the right

or is it just equal to v1 - v2?

thanx

You are guessing.

Make a full attempt, otherwise you won't learn anything.

Label each of the two nodes above the inductors (say, node L and node R) and preform the nodal analysis. (i.e. KCL combined with Ohm's law)

Also, write an equation describing Va in terms of these node voltages.

Show us your equations/work.
 
Last edited:
Note that the units for (v1 - v2)/Zc are amperes... this should answer your question.
 

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