Explore topic-wise MCQs in Electrical Engineering.

This section includes 66 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering knowledge and support exam preparation. Choose a topic below to get started.

51.

A parallel resonant band-pass filter consists of a 6.8 resistor in series with a parallel network made up of an 8 H coil and a 120 pF capacitor. The output is taken across the capacitor/coil. Assume RW = 0 . What is the center frequency of the filter?

A. 5.14 MHz
B. 514 kHz
C. 5.03 MHz
D. 503 kHz
Answer» B. 514 kHz
Discussion
52.

Referring to Problem 8, assume the input voltage is 15 V ac. What is the output voltage at the critical frequency,fc?

A. 0 V
B. 7.07 V
C. 15 V
D. 10.6 V
Answer» E.
Discussion
53.

An RC high-pass filter consists of a 0.2 F capacitor and a 220 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
Answer» E.
Discussion
54.

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
Answer» C. 9 V peak-to-peak
Discussion
55.

Critical frequencies are also called –3 dB frequencies.

A. 1
B.
Answer» B.
Discussion
56.

A series resonant band-stop filter consists of a 68 resistor, a 110 mH coil, and a 0.02 F capacitor. The internal resistance, RW, of the coil is 4 . Input voltage is 200 mV. Output voltage is taken across the coil and capacitor in series. What is the output voltage magnitude at f0?

A. 1.1 mV
B. 11.1 mV
C. 111 mV
D. 200 mV
Answer» C. 111 mV
Discussion
57.

An RC high-pass filter consists of an 820 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 F
B. 161 F
C. 0.161 F
D. 220 F
Answer» D. 220 F
Discussion
58.

An RL low-pass filter consists of a 5.6 mH coil and a 3.3 k resistor. The output voltage is taken across the resistor. The circuit's critical frequency is

A. 93.8 kHz
B. 93.8 Hz
C. 861 Hz
D. 86.12 kHz
Answer» B. 93.8 Hz
Discussion
59.

The maximum output voltage of a certain low-pass filter is 15 V. The output voltage at the critical frequency is

A. 0 V
B. 15 V
C. 10.60 V
D. 21.21 V
Answer» D. 21.21 V
Discussion
60.

An RC low-pass filter consists of a 120 resistor and a 0.002 F 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
Answer» C. 331 kHz
Discussion
61.

The roll-off rate of a basic RC or RL filter is 20 dB per decade.

A. 1
B.
C. 1
D.
Answer» B.
Discussion
62.

In a series resonant band-pass filter, a lower value of Q results in

A. a higher resonant frequency
B. a smaller bandwidth
C. a higher impedance
D. a larger bandwidth
Answer» E.
Discussion
63.

A parallel resonant band-pass filter consists of a 90 resistor in series with a parallel network made up of a 60 mH coil and a 0.02 F capacitor. The output is taken across the capacitor/coil. The coil winding has a resistance of 20 . What is the center frequency of the filter?

A. 459 Hz
B. 4,591 Hz
C. 999 Hz
D. 2,176 Hz
Answer» C. 999 Hz
Discussion
64.

An RL high-pass filter consists of a 470 resistor and a 600 mH coil. The output is taken across the coil. The circuit's critical frequency is

A. 125 Hz
B. 1,250 Hz
C. 564 Hz
D. 5,644 Hz
Answer» B. 1,250 Hz
Discussion
65.

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
Answer» C. 12.04 dB
Discussion
66.

In a certain parallel resonant band-pass filter, the resonant frequency is 14 kHz. If the bandwidth is 4 kHz, the lower frequency

A. is 7 kHz
B. is 10 kHz
C. is 12 kHz
D. cannot be determined
Answer» D. cannot be determined
Discussion