Identifying series and parallel connections

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Homework Help Overview

The discussion revolves around identifying series and parallel connections in a circuit involving capacitors. The original poster seeks to find the equivalent capacitance between two points and expresses confusion regarding the replacement of capacitors in parallel and series configurations.

Discussion Character

  • Exploratory, Assumption checking, Conceptual clarification

Approaches and Questions Raised

  • Participants explore the definitions of nodes in circuits, the criteria for identifying series and parallel connections, and the implications of circuit topology. Questions arise about the nature of connections and the definitions of components involved.

Discussion Status

The discussion is ongoing, with participants providing insights into the definitions of nodes and the characteristics of series and parallel connections. Some guidance has been offered regarding visual aids for identifying connections, but multiple interpretations are still being explored.

Contextual Notes

Participants are navigating the complexities of circuit configurations, with some expressing difficulty in identifying connections in more complicated arrangements. There is an emphasis on the importance of understanding circuit topology and the role of nodes.

  • #91
gneill said:
A wire is a equivalent to a zero valued resistance
Wires will always be there in a circuit,then this means all the circuits short circuited.Of course not,what am I missing?
 
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  • #92
I now understand how tha answer came out to be ##\frac{3C}{4}##
But I am still facing difficulty in comprehending the following
gneill said:
A wire is a equivalent to a zero valued resistance. The parallel pair on the right was shorted by the wire going over/around it.
 
  • #93
gracy said:
Wires will always be there in a circuit,then won't this all the circuits are short circuited?Of course not,what am I missing?
Go back to the discussion of what a "short circuit" means. It means a bypass (either intentional or accidental) of a normal circuit path. Wires (paths) that are supposed to be there to interconnect components are just doing what they were meant to do.

In the circuit under discussion two of the capacitors are bypassed by a wire. Whether this was intentional (i.e. a "trick" for you to discover) or an accident (the author of the problem made a mistake) cannot be known for sure, but because it is not a proper situation to have for a practical circuit (why would one design a circuit with parts that do nothing?) we call that path a short circuit: the subcircuit comprising the two capacitors is shorted. Current will not flow in that subcircuit due to the bypass.
 
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