Explore topic-wise MCQs in Engineering.

This section includes 1475 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.

801.

How many op-amps are required to implement this equation?

A. 2
B. 3
C. 4
D. 1
Answer» E.
802.

Calculate the output voltage if V1 = 33 mV and V2 = 2 mV.

A. 0 V
B. 6.6 V
C. 0.4 V
D. 2 V
Answer» D. 2 V
803.

Calculate the output voltage if V1 = 3.3 V and V2 = 0.8 V.

A. 0 V
B. 6.6 V
C. 4 V
D. 2 V
Answer» C. 4 V
804.

When a number of stages are connected in parallel, the overall gain is the product of the individual stage gains.

A. True
B. False
Answer» C.
805.

Calculate the cutoff frequency of a first-order low-pass filter for R1 = 2.5 k and C1 = 0.05 F.

A. 1.273 kHz
B. 12.73 kHz
C. 127.3 kHz
D. 127.30 Hz
Answer» B. 12.73 kHz
806.

A filter that provides a constant output from dc up to a cutoff frequency and passes no signal above that frequency is called a ________ filter.

A. low-pass
B. high-pass
C. bandpass
Answer» B. high-pass
807.

Calculate the output voltage if V1 = 0 V and V2 = 0.2 V.

A. 0 V
B. 6.6 V
C. 4 V
D. 2 V
Answer» C. 4 V
808.

Calculate the output voltage.

A. 3.02 V
B. 2.03 V
C. 1.78 V
D. 1.50 V
Answer» B. 2.03 V
809.

Calculate the output of the second stage op-amp if V1 = 25 mV.

A. 0.075 V
B. 0.525 V
C. 0.06 V
D. 4.2 V
Answer» B. 0.525 V
810.

A difference between a passive filter and an active filter is that a passive filter uses amplifier(s), but an active filter does not.

A. True
B. False
Answer» C.
811.

Calculate the output voltage Vo if V1 = V2 = 300 mV.

A. 0 V
B. 6 V
C. 6 V
D. 8 V
Answer» D. 8 V
812.

Calculate IL for this circuit.

A. 3 mA
B. 4 mA
C. 5 mA
D. 6 mA
Answer» D. 6 mA
813.

Calculate the input voltage for this circuit if Vo = 11 V.

A. 1.1 V
B. 1.1 V
C. 1 V
D. 1 V
Answer» B. 1.1 V
814.

Calculate the input voltage when Vo = 11 V.

A. 1.1 V
B. 1.1 V
C. 1 V
D. 1 V
Answer» E.
815.

Calculate the output voltage if V1 = 300 mV and V2 = 700 mV.

A. 0 V
B. 12 V
C. 12 V
D. 4 V
Answer» E.
816.

What does VCO stand for?

A. Visually-Controlled Organization
B. Voltage-Controlled Oscillator
C. Voltage-Centered Oscilloscope
Answer» C. Voltage-Centered Oscilloscope
817.

If a 1 MHz carrier is amplitude modulated with a 5 kHz audio signal, the upper-side frequency is ________ kHz.

A. 1005
B. 1000
C. 995
D. none of the above
Answer» B. 1000
818.

In AM, the carrier is changed by a modulating signal. What parameter of the carrier is changed?

A. amplitude
B. frequency
C. pulse width
D. phase
Answer» B. frequency
819.

For a four-quadrant linear multiplier, what is the output voltage, given input voltages of Vx = +2 V and Vy = 10 V?

A. +2 V
B. +1 V
C. 2 V
D. 1 V
Answer» D. 1 V
820.

The output spectrum of a ________ modulator includes upper-side and lower-side frequencies and the carrier frequency.

A. balanced
B. standard amplitude
C. none of the above
Answer» C. none of the above
821.

How many terminals does a programmable unijunction transistor (PUT) have?

A. 4
B. 3
C. 2
D. 1
Answer» C. 2
822.

The ISO-LIT Q1 16-pin Litronix opto-isolator DIP contains ________ opto-isolators.

A. 4
B. 8
C. 12
D. 6
Answer» B. 8
823.

How many terminals does a Shockley diode have?

A. 5
B. 4
C. 3
D. 2
Answer» E.
824.

Calculate the input voltage if the final output is 10.08 V.

A. 1.05 V
B. 0.525 V
C. 0.168 V
D. 4.2 V
Answer» D. 4.2 V
825.

This circuit is an example of a(n)________.

A. dc voltmeter
B. display driver
C. instrumentation amplifier
D. None of the above
Answer» D. None of the above
826.

Calculate the output of the first-stage op-amp when V1 = 25 mV.

A. 1.05 V
B. 0.075 V
C. 0.06 V
D. 4.2 V
Answer» C. 0.06 V
827.

How many op-amps are required to implement this equation?

A. 2
B. 3
C. 4
D. 1
Answer» E.
828.

Calculate the output voltage if V1 = V2 = 0.15 V.

A. 0 V
B. 4.65 V
C. 6.45 V
D. 6.45 V
Answer» E.
829.

Determine the output voltage for this circuit with a sinusoidal input of 2.5 mV.

A. 0.25 V
B. 0.125 V
C. 0.25 V
D. 0.125 V
Answer» C. 0.25 V
830.

Determine the output voltage when V1 = V2 = 1 V.

A. 0 V
B. 2 V
C. 1 V
D. 2 V
Answer» B. 2 V
831.

How many op-amps are required to implement this equation?

A. 2
B. 3
C. 4
D. 1
Answer» B. 3
832.

What is the frequency range of application of SCRs?

A. About 10 kHz
B. About 50 kHz
C. About 250 kHz
D. About 1 mHz
Answer» C. About 250 kHz
833.

A silicon diode is forward-biased. You measure the voltage to ground from the anode at ________, and the voltage from the cathode to ground at ________.

A. 0 V, 0.3 V
B. 2.3 V, 1.6 V
C. 1.6 V, 2.3 V
D. 0.3 V, 0 V
Answer» C. 1.6 V, 2.3 V
834.

The term bias in electronics usually means

A. the value of ac voltage in the signal.
B. the condition of current through a pn junction.
C. the value of dc voltages for the device to operate properly.
D. the status of the diode.
Answer» D. the status of the diode.
835.

Doping of a semiconductor material means

A. that a glue-type substance is added to hold the material together.
B. that impurities are added to increase the resistance of the material.
C. that impurities are added to decrease the resistance of the material.
D. that all impurities are removed to get pure silicon.
Answer» D. that all impurities are removed to get pure silicon.
836.

The forward voltage across a conducting silicon diode is about

A. 0.3 V.
B. 1.7 V.
C. 0.7 V.
D. 0.7 V.
Answer» E.
837.

The most common type of diode failure is a(n) ________.

A. open
B. short
C. resistive
Answer» B. short
838.

An ideal diode presents a(n) ________ when reversed-biased and a(n) ________ when forward-biased.

A. open, short
B. short, open
C. open, open
D. short, short
Answer» B. short, open
839.

Reverse breakdown is a condition in which a diode

A. is subjected to a large reverse voltage.
B. is reverse-biased and there is a small leakage current.
C. has no current flowing at all.
D. is heated up by large amounts of current in the forward direction.
Answer» B. is reverse-biased and there is a small leakage current.
840.

Which statement best describes an insulator?

A. A material with many free electrons.
B. A material doped to have some free electrons.
C. A material with few free electrons.
D. No description fits.
Answer» D. No description fits.
841.

Effectively, how many valence electrons are there in each atom within a silicon crystal?

A. 2
B. 4
C. 8
D. 16
Answer» D. 16
842.

The boundary between p-type material and n-type material is called

A. a diode.
B. a reverse-biased diode.
C. a pn junction.
D. a forward-biased diode.
Answer» D. a forward-biased diode.
843.

The movement of free electrons in a conductor is called

A. voltage.
B. current.
C. recombination.
D. equilibrium.
Answer» C. recombination.
844.

For a forward-biased diode, the barrier potential ________ as temperature increases.

A. decreases
B. remains constant
C. increases
Answer» B. remains constant
845.

The wide end arrow on a schematic indicates the ________ of a diode.

A. ground
B. direction of electron flow
C. cathode
D. anode
Answer» E.
846.

An n-type semiconductor material

A. is intrinsic.
B. has trivalent impurity atoms added.
C. has pentavalent impurity atoms added.
D. requires no doping.
Answer» D. requires no doping.
847.

A certain fiber-optic cable has the following characteristics: n1 = 1.82 and n2 = 1.73. What is the value of c?

A. 71.90
B. 0.95
C. 18.1
D. 1.81
Answer» B. 0.95
848.

An AM demodulator can be implemented with a linear multiplier followed by a ________ filter.

A. low-pass
B. high-pass
C. band-pass
D. band-stop
Answer» B. high-pass
849.

The intermediate frequency in a standard AM receiver is

A. 455 Hz.
B. 455 kHz.
C. 4.55 MHz.
D. none of the above
Answer» C. 4.55 MHz.
850.

Light may be propagated along a fiber-optic cable in which of the following modes?

A. multimode step index
B. single-mode step index
C. multimode graded index
D. all of the above
Answer» E.