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39. Determine the unknown resistance (R3) in the circuit of Figure 80.

39. Determine the unknown resistance (R3) in the circuit of Figure 80.

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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what is the resistance to R3 

### Determining the Unknown Resistance in a Circuit **Problem:** Determine the unknown resistance (\( R_3 \)) in the circuit of Figure 80. **Figure 80:** The circuit diagram consists of a voltage source and several resistors: - **Voltage Source:** 30 V with a current of 10 mA flowing from it. - **Resistors:** - \( R_1 = 680\, \Omega \) - \( R_2 = 1.0\, \text{k}\Omega \) - \( R_3 \) (unknown resistance) - \( R_4 = 270\, \Omega \) - \( R_5 = 270\, \Omega \) **Circuit Configuration:** - The voltage source is connected in series with \( R_1 \) and \( R_2 \), followed by the unknown resistor \( R_3 \). - \( R_4 \) and \( R_5 \) are connected in parallel to each other, and both are connected in series back to the negative terminal of the voltage source. To find the unknown resistance \( R_3 \), use Ohm's Law and series-parallel circuit analysis techniques.
Transcribed Image Text:### Determining the Unknown Resistance in a Circuit **Problem:** Determine the unknown resistance (\( R_3 \)) in the circuit of Figure 80. **Figure 80:** The circuit diagram consists of a voltage source and several resistors: - **Voltage Source:** 30 V with a current of 10 mA flowing from it. - **Resistors:** - \( R_1 = 680\, \Omega \) - \( R_2 = 1.0\, \text{k}\Omega \) - \( R_3 \) (unknown resistance) - \( R_4 = 270\, \Omega \) - \( R_5 = 270\, \Omega \) **Circuit Configuration:** - The voltage source is connected in series with \( R_1 \) and \( R_2 \), followed by the unknown resistor \( R_3 \). - \( R_4 \) and \( R_5 \) are connected in parallel to each other, and both are connected in series back to the negative terminal of the voltage source. To find the unknown resistance \( R_3 \), use Ohm's Law and series-parallel circuit analysis techniques.
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Do you have a simplify , simpler solution !! I do not understand how you got R3 answer 5.22K . give me a another example okay thank you asap ......

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