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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Electrical Engineering

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26 Feb 2025 11:26 AM study24x7

For the given circuit, find VTH for the circuit external to RL.

A

4.69∠51.3° V

B

4.69∠38.7° V

C

469∠38.7° mV

D

6∠0° V

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Electrical Engineering

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25 Feb 2025 04:01 PM study24x7

Determine VTH when R1 is 180 Ω and XL is 90 Ω.

A

135∠63.4° V

B

13.5∠63.4° V

C

12.2∠0° V

D

122∠0° V

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Electrical Engineering

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25 Feb 2025 03:48 PM study24x7

An RC high-pass filter consists of a 0.2 µ F capacitor and a 220 Ω resistor. The output is taken across the resistor. The circuit's critical frequency is

A

723 Hz

B

7,234 Hz

C

362 Hz

D

3,617 Hz

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Electrical Engineering

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25 Feb 2025 03:45 PM study24x7

At a certain frequency, the output voltage of a filter is 6 V and the input is 12 V. The voltage ratio in decibels is

A

6.02 dB

B

–6.02 dB

C

12.04 dB

D

–12.04 dB

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Electrical Engineering

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24 Feb 2025 12:05 PM study24x7

Vout = 500 mV, and Vin = 1.3 V. The ratio Vout/ Vin expressed in dB is

A

0 dB

B

8.30 dB

C

–8.30 dB

D

0.8 dB

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Electrical Engineering

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24 Feb 2025 11:43 AM study24x7

A sinusoidal voltage with a peak-to-peak value of 18 V is applied to an RC low-pass filter. If the reactance at the input frequency is zero, the output voltage is

A

18 V peak-to-peak

B

zero

C

9 V peak-to-peak

D

12.74 V peak-to-peak

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Electrical Engineering

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24 Feb 2025 11:43 AM study24x7

A series resonant band-stop filter consists of a 68 Ω resistor, a 110 mH coil, and a 0.02 μF capacitor. The internal resistance, RW, of the coil is 4 Ω. Input voltage is 200 mV. Output voltage is taken across the coil and capacitor in series. What is t...

A

1.1 mV

B

11.1 mV

C

111 mV

D

200 mV

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Electrical Engineering

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21 Feb 2025 11:26 AM study24x7

An RC high-pass filter consists of an 820 Ω resistor. What is the value of C so that Xc is ten times less than R at an input frequency of 12 kHz?

A

81 μF

B

161 μF

C

0.161 μF

D

220 μF

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Electrical Engineering

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21 Feb 2025 11:24 AM study24x7

In a certain low-pass filter, fc = 3.5 kHz. Its passband is

A

0 Hz to 3.5 kHz

B

0 Hz

C

3.5 kHz

D

7 kHz

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Electrical Engineering

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21 Feb 2025 11:23 AM study24x7

Referring to Problem 15, if the input voltage is a 6 V sine wave with a dc level of 10 V, what is the output voltage magnitude?

A

6 V

B

597 mV

C

5.97 V

D

0 V

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Electrical Engineering

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20 Feb 2025 03:43 PM study24x7

An RC low-pass filter consists of a 120 Ω resistor and a 0.002 μF capacitor. The output is taken across the capacitor. The circuit's critical frequency is

A

333 kHz

B

633 kHz

C

331 kHz

D

60 kHz

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