# Thevenin’s Theorem MCQ’s

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This set of Network Theory Multiple Choice Questions & Answers (MCQs) focuses on “Thevenin’s Theorem”.

1. Consider the circuit shown below. The expression of Thevenin’s voltage (VTh) is?

a) V(Z1/(Z1+Z2))
b) V(Z2/(Z1+Z2))
c) V(Z1)
d) V(Z2)

2. The value of ZTh in the circuit shown below is?

a) Z3+(Z1Z2/(Z1+Z2))
b) Z1+(Z3Z2/(Z3+Z2))
c) Z2+(Z1Z3/(Z1+Z3))
d) (Z1Z2/(Z1+Z2))

3. Thevenin’s voltage is equal to the _____________ voltage across the _______________ terminals.
a) short circuit, input
b) short circuit, output
c) open circuit, output
d) open circuit, input

4. In the circuit shown below, find the thevenin’s voltage across ‘ab’ terminals.

a) 48.5∠40.35⁰
b) 48.5∠-40.35⁰
c) 49.5∠-40.35⁰
d) 49.5∠40.35⁰

5. Determine the Thevenin’s voltage across ‘ab’ terminals in the circuit shown below.

a) 41.86∠0⁰
b) 42.86∠0⁰
c) 43.86∠0⁰
d) 44.86∠0⁰

6. Determine the load current across j5Ω in the circuit shown below.

a) 3.66∠90⁰
b) 3.66∠-90⁰
c) 4.66∠90⁰
d) 4.66∠-90⁰

7. Find the thevenin’s impedance in the circuit shown below.

a) 4.83∠-1.13⁰
b) 5.83∠1.13⁰
c) 4.83∠1.13⁰
d) 5.83∠-1.13⁰

8. Find the Thevenin’s impedance across ‘ab’ terminals in the circuit shown below.

a) j4.71
b) j5.71
c) j6.71
d) j7.71

9. Determine the thevenin’s voltage in the circuit shown below.

a) 18∠146.31⁰
b) 18∠-146.31⁰
c) 19∠146.31⁰
d) 19∠-146.31⁰

10. Find the Thevenin’s impedance in the following circuit.

a) 11.3∠45⁰
b) 12.3∠45⁰
c) 11.3∠-45⁰
d) 12.3∠-45⁰

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