What is the Thevenin equivalent voltage if a circuit has a 10V source and a 2Ω r

Practice Questions

Q1
What is the Thevenin equivalent voltage if a circuit has a 10V source and a 2Ω resistor in series with a 4Ω load?
  1. 2.5V
  2. 4V
  3. 10V
  4. 12V

Questions & Step-by-Step Solutions

What is the Thevenin equivalent voltage if a circuit has a 10V source and a 2Ω resistor in series with a 4Ω load?
Correct Answer: 10V
  • Step 1: Identify the components in the circuit. We have a 10V voltage source, a 2Ω resistor, and a 4Ω load resistor.
  • Step 2: Understand that the Thevenin equivalent voltage is the voltage across the load resistor when it is open-circuited (not connected).
  • Step 3: In this case, since the load is connected in series with the 2Ω resistor and the 10V source, we need to find the voltage across the load.
  • Step 4: When the load is connected, the voltage across the load can be calculated using the voltage divider rule, but since we are looking for the open-circuit voltage, we can directly see that the entire voltage from the source appears across the load when it is open-circuited.
  • Step 5: Therefore, the Thevenin equivalent voltage is equal to the source voltage, which is 10V.
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