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Calculate Vth for the given circuit.

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in Basic Electrical Engineering by (88.7k points)
Calculate Vth for the given circuit.

(a) 5.54V

(b) 3.33V

(c) 6.67V

(d) 3.67V

This question was addressed to me during an online exam.

This intriguing question originated from Thevenin’s Theorem in division Network Theorems of Basic Electrical Engineering

1 Answer

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Right choice is (c) 6.67V

The explanation is: 4 ohm is removed and then v across 2 ohm is calculated by voltage divider 2*10/(2+1) = 6.67V. Voltage between A and B i.e. Vth is equal to voltage across 4 ohm resistance since no current flow through 3 ohm resistance. So, Vth = 6.67V.

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