Resistors in parallel Thevenin circuit

In summary, when calculating Rth, the 40 kilo ohm and 160 kilo ohm resistors are taken as a parallel combination and then the 8 kilo ohm resistor in series is added. This method should result in the same answer as using the open-circuit voltage/short-circuit current approach, allowing for an easy way to check the answer.
  • #1
influx
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When calculating Rth, they took the parallel combo of he 40 kilo ohm and 160 kilo ohm resistors, then they added the 8 kilo ohm resistor that's in series with the combo.

Maybe I'm having a brain freeze or something but how are the 40 kilo ohm and 160 kilo ohm resistors in parallel? They don't have the same voltage across them?
 
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  • #2
When finding a Th equivalent circuit, voltage sources are treated as a short circuit when figuring Rth
 
  • #3
influx said:
When calculating Rth, they took the parallel combo of he 40 kilo ohm and 160 kilo ohm resistors, then they added the 8 kilo ohm resistor that's in series with the combo.
The answer arrived at by this method should be the same as you'd calculate using the open-circuit voltage / short-circuit current approach. This means you can always check your own answer. :smile:
 

1. What is a resistor in parallel Thevenin circuit?

A resistor in parallel Thevenin circuit refers to a circuit where multiple resistors are connected in parallel to a power source, creating a single equivalent resistance. This equivalent resistance is often referred to as the Thevenin resistance.

2. How do you calculate the equivalent resistance in a parallel Thevenin circuit?

The equivalent resistance in a parallel Thevenin circuit can be calculated using the formula 1/R= 1/R1 + 1/R2 + ... + 1/Rn, where R is the equivalent resistance and R1, R2, ..., Rn are the individual resistances connected in parallel.

3. What is the purpose of using resistors in parallel in a Thevenin circuit?

The use of resistors in parallel in a Thevenin circuit allows for the reduction of the overall resistance and the increase of the current flow in the circuit. This can be beneficial in situations where a high current is required.

4. Can resistors in parallel Thevenin circuit be replaced with a single resistor?

Yes, resistors in parallel Thevenin circuit can be replaced with a single resistor that has the same equivalent resistance as the combination of the parallel resistors. This is known as the Thevenin's theorem.

5. Are there any disadvantages to using resistors in parallel in a Thevenin circuit?

One potential disadvantage of using resistors in parallel in a Thevenin circuit is the increased complexity and cost of the circuit. Additionally, if one resistor were to fail, it could potentially affect the overall functioning of the circuit.

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