# Equivalent Circuit: Re-Draw OK?

• princejan7
In summary, the conversation is about redrawing a circuit and whether or not it is correct to do so. One person points out discrepancies in the redrawn circuit and suggests adding a wire to make it correct. The other person confirms that the redrawing is not correct and explains the need for the added wire.
princejan7
Just wondering if its ok to re-draw this
http://postimg.org/image/a074v6cor/

as this
http://postimg.org/image/uvtf6f8vv/

?

Last edited by a moderator:
Hello, your higness. Not your first post, so you should know better by now. Use the template and don't make me chase links instead of going to sleep. Maybe tomorrow.

But, out of curiosity: is the central point in the first picture a connection or is I1 = -I3 ?

Whether the central point is connected or not, the redrawing is not correct. One discrepancy (and there are others): in the original drawing, the 4 Ω and the 6 Ω share a node. In the redrawing, they do not.

princejan7 said:
Just wondering if its ok to re-draw this
http://postimg.org/image/a074v6cor/

as this
http://postimg.org/image/uvtf6f8vv/

?
No

Is not the same as

Your circuit would force I3 = -I2

and I1 = 1 Amp

#### Attachments

• pic2.png
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• pic1.png
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Last edited by a moderator:
It would be correct if you add a wire from the point between the 4 and 12 ohm resistors at the bottom to the point between the 6 ohm resistor and the 1 amp current source at the top. You separated the 4 wires coming together in the midpoint into 2 pairs.

## 1. What is an "Equivalent Circuit"?

An equivalent circuit is a simplified representation of a more complex electrical circuit, where certain elements are combined to accurately model the behavior of the original circuit.

## 2. Why is it important to re-draw an equivalent circuit?

Re-drawing an equivalent circuit can help to simplify the circuit and make it easier to analyze and understand. It can also help to identify any errors or discrepancies in the original circuit design.

## 3. What does "Re-Draw OK" mean for an equivalent circuit?

"Re-Draw OK" indicates that the re-drawn equivalent circuit accurately represents the original circuit and can be used in place of the more complex circuit for analysis and design purposes.

## 4. What components are typically included in an equivalent circuit?

An equivalent circuit may include resistors, capacitors, inductors, and voltage/current sources. These components are chosen to accurately model the behavior of the original circuit.

## 5. How is an equivalent circuit different from the original circuit?

An equivalent circuit is a simplified version of the original circuit, where certain elements have been combined or replaced in order to accurately represent the behavior of the original circuit. It may have fewer components and be easier to analyze, but should still produce similar results to the original circuit.

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