Electrical Engineering

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06 Mar 2025 11:43 AM study24x7

Determine the frequency at which the maximum power is transferred from the amplifier to the speaker in the given figure.

A

1,027 Hz

B

10,270 Hz

C

6,330 Hz

D

63,330 Hz

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Electrical Engineering

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06 Mar 2025 11:41 AM study24x7

For the circuit given, determine the Thevenin voltage as seen by RL.

A

0.574∠16.7° V

B

5.74∠16.7° V

C

0.574 ∠–16.7° V

D

5.74∠–16.7° V

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Electrical Engineering

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06 Mar 2025 11:07 AM study24x7

Referring to the given circuit, what is VTH if VS = 12∠0° V?

A

4.69∠38.7° V

B

9.38∠38.7° V

C

12∠0° V

D

6∠0° V

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Electrical Engineering

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05 Mar 2025 11:02 AM study24x7

Determine VTH if R1 is changed to 3.3 kΩ.

A

0.574∠16.7° V

B

4.63∠16.7° V

C

4.63∠39.5° V

D

0.463∠39.5° V

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Electrical Engineering

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05 Mar 2025 10:58 AM study24x7

The Norton equivalent current is

A

the current through the load

B

the open-current from the source

C

the short circuit current

D

none of the above

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Electrical Engineering

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05 Mar 2025 10:56 AM study24x7

Referring to the given circuit, how much power, in watts, is delivered to the speaker at the determined frequency if VS = 4.5 VRMS?
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A

226 mW

B

2.26 mW

C

4.24 mW

D

424 mW

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Electrical Engineering

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04 Mar 2025 10:33 AM study24x7

Referring to the given circuit, determine ZTH as seen by RL.

Referring to the given circuit, determine ZTH&nb...

A

1444∠–48.5° Ω

B

4176 ∠–73.3° Ω

C

956 ∠–48.5° Ω

D

1444 ∠–73.3° Ω

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Electrical Engineering

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04 Mar 2025 10:31 AM study24x7

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

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

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Electrical Engineering

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04 Mar 2025 10:29 AM study24x7

Referring to the given circuit, find ZTH for the part of the circuit that is external to RL.

A

129∠21.4° Ω

B

43.7∠68.6° Ω

C

43.7∠21.4° Ω

D

12.9∠68.6° Ω

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Electrical Engineering

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03 Mar 2025 12:41 PM study24x7

Referring to the given circuit, L

A

must be in parallel with RL

B

must be placed in parallel with VS

C

must have a reactance equal to XC

D

has no effect on the result

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Electrical Engineering

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03 Mar 2025 12:36 PM study24x7

The Thevenin equivalent voltage is

A

equal to the source voltage

B

the same as the load voltage

C

the open circuit voltage

D

none of the above

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Electrical Engineering

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03 Mar 2025 12:36 PM study24x7

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

A

is zero

B

is the sum of the two currents

C

is the difference between the two currents

D

cannot be determined

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Electrical Engineering

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28 Feb 2025 11:03 AM study24x7

In applying the superposition theorem,

A

the sources are considered one at a time with all others replaced by their internal impedance

B

all sources are considered independently

C

all sources are considered simultaneously

D

the sources are considered one at a time with all others replaced by their internal resistance

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Electrical Engineering

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28 Feb 2025 11:02 AM study24x7

Referring to the given circuit, find ZTH if VS is 18∠0° V.

A

9.82 ∠–51.3° kΩ

B

9.38 ∠–51.3° kΩ

C

180 ∠–38.3° kΩ

D

19.2 ∠–38.3° kΩ

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Electrical Engineering

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28 Feb 2025 10:59 AM study24x7

The two basic components of a Thevenin equivalent ac circuit are

A

the equivalent voltage source and the equivalent series impedance

B

the equivalent voltage source and the equivalent series resistance

C

the equivalent voltage source and the equivalent parallel impedance

D

the equivalent voltage source and the equivalent parallel resistance

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Electrical Engineering

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27 Feb 2025 01:18 PM study24x7

Referring to the given figure, determine ZTH as seen by RL if R1 is changed to 3.3 kΩ.

Referring to the given figure, determine ZTH&nbs...

A

1488∠–70.7° Ω

B

3859 ∠–31.2° Ω

C

5180 ∠–50.5° Ω

D

1828∠–50.2° Ω

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Electrical Engineering

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27 Feb 2025 01:17 PM study24x7

Determine VTH for the circuit external to RL in the given figure.

Determine VTH for the circuit external to&n...

A

135∠63.4° V

B

13.5∠63.4° V

C

13.5∠0° V

D

135∠0° V

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Electrical Engineering

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26 Feb 2025 11:55 AM study24x7

Referring to the given circuit, find ZTH if R is 15 kΩ and RL is 38 kΩ.

A

89.82 ∠–51.3° kΩ

B

19.2 ∠–38.3° kΩ

C

9.38 ∠–51.3° kΩ

D

180 ∠–38.3° kΩ

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Electrical Engineering

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26 Feb 2025 11:52 AM study24x7

For the circuit shown, determine ZTH for the portion of the circuit external to RL.

A

66.7 ∠–33.7° kΩ

B

6.67∠–333.7° kΩ

C

14.4 ∠–56.3° kΩ

D

1.44 ∠–33.7° kΩ

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