Electrical Engineering Mcqs Practice Test

Question 1

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

Accepted Answer

D. a larger bandwidth

Question 2

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

Accepted Answer

A. 10.60 V

Question 3

The same signal in Problem 2 is applied to an RC high-pass filter. If the reactance is zero at the input frequency, the output voltage is____________?

Accepted Answer

B. 18 V peak-to-peak

Question 4

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____________?

Accepted Answer

B. zero

Question 5

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

Accepted Answer

C. -8.30 dB

Question 6

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

Accepted Answer

A. 5.14 MHz

Question 7

In a certain low-pass filter, fc = 3.5 kHz. If the input voltage is a 6 V sine wave with a dc level of 10 V, what is the output voltage magnitude?

Accepted Answer

B. 5.97 V

Question 8

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

Accepted Answer

A. 93.8 kHz

Question 9

An RC high-pass filter consists of a 0.2 µF capacitor and a 220 Ω resistor. The output is taken across the resistor. The circuit’s critical frequency is_____________?

Accepted Answer

D. 3,617 Hz

Question 10

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_____________?

Accepted Answer

B. -6.02 dB

Question 11

A series resonant band-pass filter consists of a 2 mH coil, a 0.005 µF capacitor, and a 120 Ω resistor. The winding resistance of the coil is 12 Ω. The output voltage is taken off the resistor. Input voltage is 12 Vrms. What is the output voltage magnitude at the center frequency (f0)?

Accepted Answer

A. 10.9 V

Question 12

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 the output voltage magnitude at f0?

Accepted Answer

B. 11.1 mV

Question 13

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

Accepted Answer

C. 0 Hz to 3.5 kHz

Question 14

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

Accepted Answer

C. is 12 kHz

Question 15

At a certain frequency, the output voltage of a filter is 6 V and the input is 12 V.the filter’s bandwidth is____________?

Accepted Answer

D. 53 Hz

Question 16

The first goal to accomplish in analyzing a complex series-parallel circuit is to____________?

Accepted Answer

B. solve for the total current and resistance

Question 17

The positive (+) and negative (-) ends of the battery are called ___________?

Accepted Answer

C. battery terminals

Question 18

When a Wheatstone bridge is in a balanced condition, the center voltmeter in the bridge will read_____________?

Accepted Answer

C. zero volts

Question 19

In a series–parallel circuit, individual component power dissipation are calculated using_____________?

Accepted Answer

A. individual component parameters

Question 20

In a series–parallel circuit consisting of R1 and R2 in series and connected in parallel with R3, if R1 opens, then R2‘s voltage will:___________?

Accepted Answer

C. decrease