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Determine the equivalent thevenin’s voltage between terminals A and B in the circuit shown below.

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Determine the equivalent thevenin’s voltage between terminals A and B in the circuit shown below.

(a) 5

(b) 15

(c) 25

(d) 35

The question was asked by my school principal while I was bunking the class.

This intriguing question comes from Thevenin’s Theorem in chapter Useful Theorems in Circuit Analysis of Network Theory

1 Answer

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Correct option is (c) 25

Easy explanation: Current through 3Ω resistor is 0A. The current through 6Ω resistor =  (50-10)/(10+6)=2.5A. The voltage drop across 6Ω resistor = 25×6=15V. So the voltage across terminals A and B = 0+15+10 = 25V.

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