The value of Thevenin's voltage across terminal a - b will be ______.

F1 Engineering Priya 21 10 24  D3

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SSC JE Electrical 06 Jun 2024 Shift 2 Official Paper - 1
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  1. 12 V
  2. 0 V
  3. 50 V
  4. 62 V

Answer (Detailed Solution Below)

Option 4 : 62 V
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Detailed Solution

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Thevenin Theorem

Thevenin’s theorem states that it is possible to simplify any linear circuit, into an equivalent circuit with a single voltage source and a series resistance.

qImage66c2dd3f830abc4dfe0bce03Steps to calculate:

  1. Thevenin Resistance (Rth): Open the circuit to the terminal from where the Thevenin resistance has to be found. While finding the Rth, short circuit the independent voltage source and open circuit the independent current source.
  2. Thevenin Voltage (Vth): This is the open-circuit voltage across the terminals where the load was connected.


Calculation

F1 Engineering Priya 21 10 24  D4

The voltage drop across 5Ω is: 

V = 5 × 10 = 50 volts

Applying KVL in loop:

-12 + V - 50 = 0

V = 62 volts

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