1728 + Mcqs in Electronics Page 18 McqOptions

851.	A pure semiconductor material ___ very well.
A.	conducts
B.	insulates
C.	conducts and insulates
D.	neither conducts nor insulates
Answer» E.

Discussion

852.	The number 24.5, rounded to two significant digits, is 25.
A.	True
B.	False
Answer» C.

Discussion

853.	The peak output voltage from the circuit in the given circuit equals ___.
A.	3 V
B.	3.7 V
C.	2.3 V
D.	0 V
Answer» D. 0 V

Discussion

854.	An electron can move to another atom's orbit only while in the _______.
A.	valence band
B.	conduction band
C.	orbit nearest the nucleus
D.	covalent band
Answer» C. orbit nearest the nucleus

Discussion

855.	The average value of the output voltage from the circuit in the given circuit equals ___.
A.	5.48 V
B.	2.74 V
C.	0 V
D.	6.37 V
Answer» B. 2.74 V

Discussion

856.	Atoms in a silicon crystal are held together by ___ bonds.
A.	crystal
B.	chemical
C.	electrical
D.	covalent
Answer» E.

Discussion

857.	The forward biased characteristics of a zener diode are the same as those of a diode.
A.	True
B.	False
Answer» B. False

Discussion

858.	Breakdown voltage and peak inverse voltage are the same.
A.	True
B.	False
Answer» B. False

Discussion

859.	A rectifying diode can change ac voltage to dc voltage.
A.	True
B.	False
Answer» B. False

Discussion

860.	The barrier potential is the small difference of potential created by positive and negative ions on either side of the depletion region.
A.	True
B.	False
Answer» B. False

Discussion

861.	Dark current is a small reverse current that flows in a photodiode that is receiving no light.
A.	True
B.	False
Answer» B. False

Discussion

862.	One of the advantages of using transformer coupling in a half-wave rectifier is that it allows the ac source to be directly connected to the load.
A.	True
B.	False
Answer» C.

Discussion

863.	A zener diode can be used to provide voltage regulation in a power supply.
A.	True
B.	False
Answer» B. False

Discussion

864.	The small amount of ac signal present on the output of a filtering network for a dc power supply is known as ________.
A.	pulsating dc
B.	trickle
C.	ripple
D.	waffle
Answer» D. waffle

Discussion

865.	The voltage across the inductor is ______ in the given circuit.
A.	6.5 V
B.	12.4 V
C.	14 V
D.	50 V
Answer» E.

Discussion

866.	When a parallel tank circuit is used in series with an output load resistor the filter is ______.
A.	low-pass
B.	band-stop
C.	band-pass
D.	high-pass
Answer» C. band-pass

Discussion

867.	The phase angle is ______ in the given circuit.
A.	27.6
B.	62.4
C.	74.1
D.	76.1
Answer» B. 62.4

Discussion

868.	The output voltage at the resonant frequency is _____ in the given circuit.
A.	0 V
B.	557 mV
C.	6.08 V
D.	6.5 V
Answer» D. 6.5 V

Discussion

869.	The ______ of a circuit describes the ability of that circuit to respond to certain frequencies while rejecting all others.
A.	bandwidth
B.	selectivity
C.	sensitivity
D.	quality factor
Answer» C. sensitivity

Discussion

870.	The total circuit current is _____ in the given circuit.
A.	1.52 mA
B.	1.61 mA
C.	2.21 mA
D.	2.71 mA
Answer» D. 2.71 mA

Discussion

871.	At frequencies well above and below the resonant frequency, the series RLC circuit looks ______ and the parallel RLC circuit looks ______.
A.	like a short, like an open
B.	like an open, like a short
C.	inductive, capacitive
D.	capacitive, inductive
Answer» E.

Discussion

872.	The number 560,000 is expressed in scientific notation.
A.	True
B.	False
Answer» C.

Discussion

873.	Subtracting 18 102 from 480 101 results in 30 102.
A.	True
B.	False
Answer» B. False

Discussion

874.	The coulomb is the unit for charge.
A.	True
B.	False
Answer» B. False

Discussion

875.	Voltage, not current, determines the severity of an electrical shock.
A.	True
B.	False
Answer» C.

Discussion

876.	Only electrical quantities have symbols associated with them.
A.	True
B.	False
Answer» C.

Discussion

877.	If an electrical system is compared to a fluid system, the electrical current corresponds to the:
A.	pressure
B.	pump
C.	water wheel
D.	water flow
Answer» E.

Discussion

878.	What do you call a diagram that shows the electrical connections of a circuit's components?
A.	A schematic diagram
B.	A pictorial diagram
C.	A block diagram
D.	An electrical diagram
Answer» B. A pictorial diagram

Discussion

879.	A ___ is created when an electron moves from the valence band to the conduction band.
A.	hole
B.	gap
C.	vacancy
D.	blank
Answer» B. gap

Discussion

880.	The average value of the half-wave rectified output voltage is approximately __________ of Vp.
A.	31.8%
B.	63.6%
C.	70.7%
D.	100%
Answer» B. 63.6%

Discussion

881.	Typically the forward voltage on an LED is between _______ and ________.
A.	1.5 V, 3.7 V
B.	0.7 V, 1.1 V
C.	1 V, 3 V
D.	1 V, 6 V
Answer» D. 1 V, 6 V

Discussion

882.	The name of the circuit in the given circuit is the ___.
A.	half-wave rectifier
B.	center-tapped full-wave rectifier
C.	full-wave bridge rectifier
D.	half-wave bridge rectifier
Answer» D. half-wave bridge rectifier

Discussion

883.	A reverse biased diode will act as an open switch.
A.	True
B.	False
Answer» B. False

Discussion

884.	If the diode in a series circuit is reverse biased, the resistor will drop all the applied voltage.
A.	True
B.	False
Answer» C.

Discussion

885.	The PIV rating of a diode in a full-wave bridge rectifier is more than that required for a full-wave center-tapped configuration.
A.	True
B.	False
Answer» C.

Discussion

886.	The troubleshooting process for a typical dc power supply contains four steps.
A.	True
B.	False
Answer» C.

Discussion

887.	When a parallel tank is used in series with an output load resistor the filter is a(n) ______ filter.
A.	band-stop
B.	low-pass
C.	bandpass
D.	high-pass
Answer» B. low-pass

Discussion

888.	The phase angle is ______ in the given circuit.
A.	34.5
B.	43.3
C.	46.7
D.	55.5
Answer» D. 55.5

Discussion

889.	The ___ of a circuit describes the ability of that circuit to respond to certain frequencies while rejecting all others.
A.	bandwidth
B.	selectivity
C.	sensitivity
D.	quality factor
Answer» C. sensitivity

Discussion

890.	The output voltage is _____ at the resonant frequency in the given circuit.
A.	0 mV
B.	31.4 mV
C.	66.5 mV
D.	380 mV
Answer» D. 380 mV

Discussion

891.	With the frequency given, the circuit in the given circuit is operating above resonance.
A.	True
B.	False
Answer» B. False

Discussion

892.	The current through the inductor is 5 amps.
A.	True
B.	False
Answer» C.

Discussion

893.	Resonance will occur when XC = XL in the circuit below.
A.	True
B.	False
Answer» B. False

Discussion

894.	The resonant frequency fo is 19 kHz.
A.	True
B.	False
Answer» C.

Discussion

895.	The impedance is 1177 .
A.	True
B.	False
Answer» B. False

Discussion

896.	What is the power factor?
A.	0.279
B.	0.479
C.	0.679
D.	0.879
Answer» E.

Discussion

897.	What is the phase angle?
A.	61.4
B.	28.5
C.	-28.5
D.	-61.4
Answer» D. -61.4

Discussion

898.	What would be the power factor for an RLC circuit that acts inductively?
A.	+90 degrees leading
B.	one
C.	zero
D.	90 degrees lagging
Answer» D. 90 degrees lagging

Discussion

899.	Voltage lags current in an RLC circuit when it acts:
A.	capacitively
B.	resistively
C.	inductively
D.	resonantly
Answer» B. resistively

Discussion

900.	What is the bandwidth of the circuit in the given circuit?
A.	11.6 Hz
B.	275.9 Hz
C.	1.5 kHz
D.	3.2 kHz
Answer» C. 1.5 kHz

Discussion

Explore topic-wise MCQs in Engineering.

A pure semiconductor material ___ very well.

The number 24.5, rounded to two significant digits, is 25.

The peak output voltage from the circuit in the given circuit equals ___.

An electron can move to another atom's orbit only while in the _______.

The average value of the output voltage from the circuit in the given circuit equals ___.

Atoms in a silicon crystal are held together by ___ bonds.

The forward biased characteristics of a zener diode are the same as those of a diode.

Breakdown voltage and peak inverse voltage are the same.

A rectifying diode can change ac voltage to dc voltage.

The barrier potential is the small difference of potential created by positive and negative ions on either side of the depletion region.

Dark current is a small reverse current that flows in a photodiode that is receiving no light.

One of the advantages of using transformer coupling in a half-wave rectifier is that it allows the ac source to be directly connected to the load.

A zener diode can be used to provide voltage regulation in a power supply.

The small amount of ac signal present on the output of a filtering network for a dc power supply is known as ________.

The voltage across the inductor is ______ in the given circuit.

When a parallel tank circuit is used in series with an output load resistor the filter is ______.

The phase angle is ______ in the given circuit.

The output voltage at the resonant frequency is _____ in the given circuit.

The ______ of a circuit describes the ability of that circuit to respond to certain frequencies while rejecting all others.

The total circuit current is _____ in the given circuit.

At frequencies well above and below the resonant frequency, the series RLC circuit looks ______ and the parallel RLC circuit looks ______.

The number 560,000 is expressed in scientific notation.

Subtracting 18 102 from 480 101 results in 30 102.

The coulomb is the unit for charge.

Voltage, not current, determines the severity of an electrical shock.

Only electrical quantities have symbols associated with them.

If an electrical system is compared to a fluid system, the electrical current corresponds to the:

What do you call a diagram that shows the electrical connections of a circuit's components?

A ___ is created when an electron moves from the valence band to the conduction band.

The average value of the half-wave rectified output voltage is approximately __________ of Vp.

Typically the forward voltage on an LED is between _______ and ________.

The name of the circuit in the given circuit is the ___.

A reverse biased diode will act as an open switch.

If the diode in a series circuit is reverse biased, the resistor will drop all the applied voltage.

The PIV rating of a diode in a full-wave bridge rectifier is more than that required for a full-wave center-tapped configuration.

The troubleshooting process for a typical dc power supply contains four steps.

When a parallel tank is used in series with an output load resistor the filter is a(n) ______ filter.

The phase angle is ______ in the given circuit.

The ___ of a circuit describes the ability of that circuit to respond to certain frequencies while rejecting all others.

The output voltage is _____ at the resonant frequency in the given circuit.

With the frequency given, the circuit in the given circuit is operating above resonance.

The current through the inductor is 5 amps.

Resonance will occur when XC = XL in the circuit below.

The resonant frequency fo is 19 kHz.

The impedance is 1177 .

What is the power factor?

What is the phase angle?

What would be the power factor for an RLC circuit that acts inductively?

Voltage lags current in an RLC circuit when it acts:

What is the bandwidth of the circuit in the given circuit?

At frequencies well above and below the resonant frequency, the series RLC circuit looks and the parallel RLC circuit looks .

Typically the forward voltage on an LED is between _ and __.