Question on voltage in a Thevenin equivalent circuit

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  • Thread starter influx
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  • #1
influx
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thevneogo.png


I am trying to refresh my basic electricity knowledge so the questions might be a little stupid lol.

1) Am I correct in saying that the voltage, V1, across the 6 ohm resistor is equal to the VOC?

2) Why isn't the voltage across the voltage source, V2, equal to V1 and VOC? I thought that the voltages in a parallel circuit are equal?


Cheers!
 

Answers and Replies

  • #2
gneill
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thevneogo.png


I am trying to refresh my basic electricity knowledge so the questions might be a little stupid lol.

1) Am I correct in saying that the voltage, V1, across the 6 ohm resistor is equal to the VOC?
Yes. There's no potential drop across the 5 Ω resistor when terminals a-b are open as shown.

2) Why isn't the voltage across the voltage source, V2, equal to V1 and VOC? I thought that the voltages in a parallel circuit are equal?
They are not in parallel. There are components in between their respective leads. In particular, the 3 Ω resistor and the controlled voltage source separate the 10 V supply and the 6 Ω resistor's upper leads.
 
  • #3
influx
166
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Yes. There's no potential drop across the 5 Ω resistor when terminals a-b are open as shown.


They are not in parallel. There are components in between their respective leads. In particular, the 3 Ω resistor and the controlled voltage source separate the 10 V supply and the 6 Ω resistor's upper leads.

So if there are components between the wire connecting two elements, the two elements are not in parallel?

Thanks
 
  • #4
gneill
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So if there are components between the wire connecting two elements, the two elements are not in parallel?

Thanks

Correct. For two components to be in parallel they must share two nodes.
 

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