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Questions and Answers
What is the equivalent resistance at terminals a-b for Circuit Diagram 1?
What is the equivalent resistance at terminals a-b for Circuit Diagram 1?
- 50 Ω
- 30 Ω
- 40 Ω (correct)
- 12 Ω
Which resistors in Circuit Diagram 2 are in parallel?
Which resistors in Circuit Diagram 2 are in parallel?
- 40 Ω and 10 Ω (correct)
- 10 Ω and 80 Ω
- 30 Ω and 40 Ω
- 60 Ω and 50 Ω
How would the total resistance change if the 60 Ω resistor in Circuit Diagram 1 is removed?
How would the total resistance change if the 60 Ω resistor in Circuit Diagram 1 is removed?
- It would decrease to 20 Ω.
- It would drop to 10 Ω.
- It would increase significantly. (correct)
- It would remain unchanged.
What is the total equivalent resistance at terminals a-b for Circuit Diagram 2?
What is the total equivalent resistance at terminals a-b for Circuit Diagram 2?
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If the 80 Ω resistor in Circuit Diagram 2 was replaced with a 400 Ω resistor, what would likely happen to the total resistance?
If the 80 Ω resistor in Circuit Diagram 2 was replaced with a 400 Ω resistor, what would likely happen to the total resistance?
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Study Notes
Circuit Diagram 1
- The circuit consists of three resistors: 30 Ω, 20 Ω, and 60 Ω.
- The 20 Ω and 60 Ω resistors are in parallel with each other, forming a combined resistance of 15 Ω.
- 15 Ω is then in series with the 30 Ω resistor, giving a total resistance of 45 Ω between points a and b.
Circuit Diagram 2
- The circuit is more complex, containing six resistors.
- The 30 Ω resistor and the 40 Ω resistor are in series, giving a combined resistance of 70 Ω.
- The 10 Ω resistor and the 80 Ω resistor are in series, giving a combined resistance of 90 Ω.
- The 50 Ω resistor is in parallel with the combination of the 10 Ω and 80 Ω resistors.
- This combination then combines with the 60 Ω resistor to form a parallel with the combination of the 30 Ω and 40 Ω resistors.
- This complex arrangement results in the equivalent resistance from terminal a to b being approximately 26.5 Ω.
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