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Circuit Theorems In Ac Analysis Online Exam Quiz

Important questions about Circuit Theorems In Ac Analysis. Circuit Theorems In Ac Analysis MCQ questions with answers. Circuit Theorems In Ac Analysis exam questions and answers for students and interviews.

1. Referring to the given circuit, what is V TH if V S = 12?0° V?

Options

A : 4.69?38.7° V

B : 9.38?38.7° V

C : 12?0° V

D : 6?0° V

2. Referring to the given circuit, how much power, in watts, is delivered to the speaker at the determined frequency if V S = 4.5 V RMS ?

Options

A : 226 mW

B : 2.26 mW

C : 4.24 mW

D : 424 mW

3. The Thevenin equivalent voltage is

Options

A : equal to the source voltage

B : the same as the load voltage

C : the open circuit voltage

D : none of the above

4. Referring to the given circuit, find Z TH for the part of the circuit that is external to R L .

Options

A : 129?21.4° ?

B : 43.7?68.6° ?

C : 43.7?21.4° ?

D : 12.9?68.6° ?

8. Determine V TH if R 1 is changed to 3.3 k?.

Options

A : 0.574?16.7° V

B : 4.63?16.7° V

C : 4.63?39.5° V

D : 0.463?39.5° V

9. Norton's theorem gives

Options

A : an equivalent current source in parallel with an equivalent impedance

B : an equivalent current source in series with an equivalent impedance

C : an equivalent voltage source in parallel with an equivalent impedance

D : an equivalent voltage source in series with an equivalent impedance

10. If two currents are in the same direction at any instant of time in a given branch of a circuit, the net current at that instant

Options

A : is zero

B : is the sum of the two currents

C : is the difference between the two currents

D : cannot be determined

1. Referring to the given circuit, find Z TH if R is 15 k? and R L is 38 k?.

Options

A : 89.82 ??51.3° k?

B : 19.2 ??38.3° k?

C : 9.38??51.3° k?

D : 180 ??38.3° k?

2. In order to get maximum power transfer from a capacitive source, the load must

Options

A : have a capacitive reactance equal to circuit resistance

B : have an impedance that is the complex conjugate of the source impedance

C : be as capacitive as it is inductive

D : none of the above

3. For the circuit shown, determine Z TH for the portion of the circuit external to R L .

Options

A : 66.7 ??33.7° k?

B : 6.67??333.7° k?

C : 14.4 ??56.3° k?

D : 1.44 ??33.7° k?

4. Thevenin's theorem provides a method for the reduction of any ac circuit to an equivalent form consisting of an equivalent current source in parallel with an equivalent impedance.

Options

A : True

B : False

C :

D :

5. The superposition theorem is useful for the analysis of single-source circuits.

Options

A : True

B : False

C :

D :

6. An equivalent circuit is one that produces the same voltage and current to a given load as the original circuit that it replaces.

Options

A : True

B : False

C :

D :

7. In order to get maximum power transfer from a capacitive source, the load must have an impedance that is the complex conjugate of the source impedance.

Options

A : True

B : False

C :

D :

8. One circuit is equivalent to another, in the context of Thevenin's theorem, when the circuits produce the same voltage.

Options

A : True

B : False

C :

D :

9. A Thevenin ac equivalent circuit always consists of an equivalent ac voltage source and an equivalent capacitance.

Options

A : True

B : False

C :

D :

10. The superposition theorem is useful for circuit analysis only in ac circuits.

Options

A : True

B : False

C :

D :

1. Like Thevenin's theorem, Norton's theorem provides a method of reducing a more complex circuit to a simpler, more manageable form for analysis.

Options

A : True

B : False

C :

D :

2. Norton's theorem provides a method for the reduction of any ac circuit to an equivalent form consisting of an equivalent voltage source in series with an equivalent impedance.

Options

A : True

B : False

C :

D :

3. In an ac circuit, power to the load peaks at the frequency at which the load impedance is the complex conjugate of the output impedance.

Options

A : True

B : False

C :

D :

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