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Question

The Thevenin equivalent voltage at terminals a-b is _________________.

This question was previously asked in
RRB JE 2025 CBT 2 Mechanical and Allied Engg Question Paper English (2-Jul-2026) (Shift-1)
The correct answer is

10 V 

The Thevenin equivalent voltage (Vth) at terminals a-b is the open-circuit voltage when no load is connected.

Procedure:

  • Open terminals a-b (remove any load).
  • Apply KVL/KCL or superposition to find voltage across a-b.
  • Vth = Voc at terminals a-b.

The circuit with specific values is in the original question paper. The correct answer corresponds to Option 2.

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Important Questions from Thevenin's Theorem

  1. A Norton equivalent circuit consists of a 100 μA current source in parallel with a 10 kΩ resistance. If this is converted into a Thevenin equivalent, how much is V Th ?
  2. ______ is an analytical method used to change a complex circuit into a simple equivalent circuit consisting of a single resistance in series with a source voltage.

  3. According to the Thevenin's Theorem, any two terminal bilateral linear DC circuits can be replaced by an equivalent circuit consisting of:

  4. If Thevenin's voltage is 89.3 volts and Thevenin's resistance is 46.98 ohms then what will be the maximum power delivered to the load present in the network?

  5. Which of the following theorem states that "a linear two-terminal circuit can be replaced by an equivalent circuit consisting of a voltage source VTH in series with a resistor RTH", where VTH is the open circuit voltage at the terminals and RTH is the input or equivalent resistance at the terminals, when the independent sources are turned off

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