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lisbeth99398's Question
Math
Posted 3 months ago

Un circuito Thévenin podría permitir reemplazar una sección del circuito eléctrico con una sola fuente de voltaje y una resistencia, lo cual simplifica los cálculos. En el circuito anexo, se desea obtener el circuito Thévenin para la resistencia R de valor desconocido. Además se desea utilizar el simulador PhET Equipo de Construcción de Circuitos DC para encontrar el Voltaje de Thévenin y el voltaje de cada resistencia en el circuito.
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Answer from Sia
Posted 3 months ago
Solution by Steps
step 1
To find the Thevenin equivalent voltage (VthV_{th}) across the unknown resistor RR, we first need to calculate the equivalent resistance of the resistors R1R_1 and R2R_2 in parallel. The formula for two resistors in parallel is given by: Req=R1R2R1+R2R_{eq} = \frac{R_1 \cdot R_2}{R_1 + R_2}. Substituting the values, we have: Req=481648+16R_{eq} = \frac{48 \cdot 16}{48 + 16}
step 2
Calculating ReqR_{eq}: Req=76864=12ΩR_{eq} = \frac{768}{64} = 12 \, \Omega. Now, we have ReqR_{eq}, which is the equivalent resistance of R1R_1 and R2R_2
step 3
Next, we find the Thevenin voltage (VthV_{th}) across the unknown resistor RR. Since ReqR_{eq} is in parallel with the voltage source E2E_2, we can use the voltage divider rule. The voltage across ReqR_{eq} is given by: Vth=E2ReqReq+RV_{th} = E_2 \cdot \frac{R_{eq}}{R_{eq} + R}
step 4
To find the voltage across each resistor, we can use the formula: VR1=VthR2R1+R2V_{R1} = V_{th} \cdot \frac{R_2}{R_1 + R_2} and VR2=VthR1R1+R2V_{R2} = V_{th} \cdot \frac{R_1}{R_1 + R_2}. Substitute the known values to find VR1V_{R1} and VR2V_{R2}
Answer
The Thevenin equivalent voltage is calculated, and the voltages across each resistor can be determined using the voltage divider rule.
Key Concept
Thevenin's theorem simplifies complex circuits into a single voltage source and resistance.
Explanation
This method allows for easier analysis of circuits, especially when determining the behavior of a specific component like the unknown resistor RR.

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