Finding Current and Voltage Questions?

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SUMMARY

This discussion focuses on two key questions regarding electrical circuits: simplifying resistance to find Rab and understanding the concept of equivalent resistance (Req). Participants clarify that Req refers to the total resistance as viewed from a specific point in the circuit, particularly in relation to a 20V supply. Additionally, the importance of recognizing connections between nodes, such as the wire from node c to node f, is emphasized for accurate circuit analysis.

PREREQUISITES
  • Basic understanding of electrical circuits and components
  • Familiarity with resistance simplification techniques
  • Knowledge of equivalent resistance concepts
  • Experience with circuit analysis involving voltage sources
NEXT STEPS
  • Study techniques for simplifying resistances in series and parallel circuits
  • Learn about calculating equivalent resistance in complex circuits
  • Explore circuit analysis methods using Kirchhoff's laws
  • Investigate the implications of node connections in circuit design
USEFUL FOR

Electrical engineering students, circuit designers, and anyone involved in analyzing and simplifying electrical circuits will benefit from this discussion.

Paymemoney
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Hi
I have two question i am stuck on can someone give me some hints on how would i start it.
The attachment has the problems i am referring to.
View attachment tut1qns.doc

In Question 1 how would you simplify the resistance so you can get Rab?

In Question 2 i have a problem with what exactly does it mean by Req? Does it ask to simplify the resistance?


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Paymemoney said:
Hi
In Question 1 how would you simplify the resistance so you can get Rab?

Pay attention to that sneaky wire going from node c to node f. What does that connection imply about nodes c and f?

In Question 2 i have a problem with what exactly does it mean by Req? Does it ask to simplify the resistance?

Req means equivalent resistance as seen from the point indicated. In this case the bent arrow is meant to imply a vertical slice through the circuit connections at that point. So it looks like they want you to find the total resistance of the whole circuit as seen by the 20V supply.
 

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