1728 + Mcqs in Electronics Page 16 McqOptions

751.	What is the current through the capacitor in the given circuit?
A.	3.5 mA
B.	5.5 mA
C.	9 mA
D.	11.4 mA
Answer» B. 5.5 mA

Discussion

752.	What is the true power consumed in a 30 V series RLC circuit if Z = 20 ohms and R = 10 ohms?
A.	15.0 watts
B.	22.5 watts
C.	30.0 watts
D.	45.0 watts
Answer» C. 30.0 watts

Discussion

753.	What is the current phase angle for a parallel RLC circuit when IL = 15.3 A, IC = 0.43 A, and IR = 3.5 A?
A.	76.7 degrees
B.	4.25 degrees
C.	88.8 degrees
D.	76.7 degrees
Answer» E.

Discussion

754.	At any resonant frequency, what voltage is measured across the two series reactive components?
A.	applied
B.	reactive
C.	zero
D.	inductive and capacitive
Answer» D. inductive and capacitive

Discussion

755.	What is the resonance frequency?
A.	31.8 Hz
B.	71 Hz
C.	7.1 kHz
D.	31.8 kHz
Answer» C. 7.1 kHz

Discussion

756.	The voltage out when a 10 k load is connected is 5.7 volts.
A.	True
B.	False
Answer» B. False

Discussion

757.	When resistors burn out, they usually short.
A.	True
B.	False
Answer» C.

Discussion

758.	Attaching a 6 k load to a voltage divider will cause a smaller decrease in the output voltage than will attaching a 5 k load.
A.	True
B.	False
Answer» B. False

Discussion

759.	A loaded voltage divider is a common application of a series-parallel circuit.
A.	True
B.	False
Answer» B. False

Discussion

760.	The total power is 10 watts.
A.	True
B.	False
Answer» C.

Discussion

761.	The total resistance in the given circuit can be found using the formula: RT = R1 + R2 \|\| R3 \|\| R4.
A.	True
B.	False
Answer» B. False

Discussion

762.	When a load resistance is connected to the output of a voltage divider circuit, the source current increases.
A.	True
B.	False
Answer» B. False

Discussion

763.	Opens and shorts are typical problems that occur in electric circuits.
A.	True
B.	False
Answer» B. False

Discussion

764.	A Wheatstone bridge may be used to determine the value of an unknown resistance.
A.	True
B.	False
Answer» B. False

Discussion

765.	If the output voltage of a certain loaded voltage divider is 12 V, the output voltage might decrease when the load is removed.
A.	True
B.	False
Answer» C.

Discussion

766.	If the Wheatstone bridge is balanced in the given circuit, the voltage between points A and B (VAB) equals the source voltage (VS).
A.	True
B.	False
Answer» C.

Discussion

767.	The current through R6 is 8.5 mA.
A.	True
B.	False
Answer» C.

Discussion

768.	Observed voltages not being shared identify components in parallel in a series parallel circuit.
A.	True
B.	False
Answer» C.

Discussion

769.	R2 is open.
A.	True
B.	False
Answer» C.

Discussion

770.	What is the range between f1 and f2 of an RLC circuit that resonates at 150 kHz and has a Q of 30?
A.	100.0 kHz to 155.0 kHz
B.	147.5 kHz to 152.5 kHz
C.	4500 kHz to 295.5 kHz
D.	149,970 Hz to 150,030 Hz
Answer» C. 4500 kHz to 295.5 kHz

Discussion

771.	When a full band of frequencies is allowed to pass through a filter circuit to the output, the resonant circuit is called a:
A.	low-pass filter
B.	high-pass filter
C.	band-stop filter
D.	bandpass filter
Answer» E.

Discussion

772.	What is the resonant frequency in the given circuit?
A.	11.6 Hz
B.	275.8 Hz
C.	1.5 kHz
D.	3.2 kHz
Answer» E.

Discussion

773.	Series RLC voltage or impedance totals must be calculated by:
A.	subtracting the values
B.	graphing the angles
C.	adding vectors
D.	multiplying the values
Answer» D. multiplying the values

Discussion

774.	What is the total current?
A.	15.6 mA
B.	17.8 mA
C.	21.9 mA
D.	26.0 mA
Answer» B. 17.8 mA

Discussion

775.	When XC = XL the circuit:
A.	draws maximum current
B.	applied voltage is zero
C.	is at resonance
D.	draws minimum current
Answer» D. draws minimum current

Discussion

776.	How much current will flow in a series RLC circuit when VT = 100 V, XL = 160 , XC = 80 , and R = 60 ?
A.	1 A
B.	1 mA
C.	6.28 A
D.	10 A
Answer» B. 1 mA

Discussion

777.	What is the range between f1 and f2 of an RLC circuit that resonates at 150 kHz and has a Q of 30?
A.	100.0 kHz to 155.0 kHz
B.	147.5 kHz to 152.5 kHz
C.	4500 kHz to 295.5 kHz
D.	149,970 Hz to 150,030 Hz
Answer» C. 4500 kHz to 295.5 kHz

Discussion

778.	What is the quality factor?
A.	999
B.	223
C.	2.2
D.	0.99
Answer» D. 0.99

Discussion

779.	What effect will a parallel tank have upon final filter current?
A.	very little
B.	The bandpass frequencies will change.
C.	The frequency cutoff will change.
D.	The impedance will block output.
Answer» B. The bandpass frequencies will change.

Discussion

780.	What is the total current?
A.	56.6 mA
B.	141 mA
C.	191 mA
D.	244 mA
Answer» C. 191 mA

Discussion

781.	When a parallel circuit resonates it is said to:
A.	flywheel
B.	oscillate
C.	both of the above
D.	none of the above
Answer» D. none of the above

Discussion

782.	At resonance, the term bandwidth includes all frequencies that allow what percentage of maximum current to flow?
A.	50
B.	62.3
C.	70.7
D.	95.3
Answer» D. 95.3

Discussion

783.	What is the voltage across the capacitor in the given circuit?
A.	6.8 V
B.	11.9 V
C.	16.1 V
D.	22.9 V
Answer» E.

Discussion

784.	In a series RLC circuit the current can be found using:
A.	<img src="/_files/images/basic-electronics/complete/mca9_1001a1.gif" align="absmiddle">
B.	<img src="/_files/images/basic-electronics/complete/mca9_1001b1.gif" align="absmiddle">
C.	both of the above
D.	none of the above
Answer» D. none of the above

Discussion

785.	The phase angle between the two waveforms in the given circuit equals _____.
A.	75
B.	15
C.	105
D.	45
Answer» C. 105

Discussion

786.	If a sine wave's frequency equals 25 MHz, its period equals _____.
A.	25 s
B.	25 ms
C.	4 s
D.	40 ns
Answer» E.

Discussion

787.	If a sine wave's period equals 50 ms, its frequency equals _____.
A.	20 Hz
B.	0.02 Hz
C.	50 Hz
D.	50 kHz
Answer» B. 0.02 Hz

Discussion

788.	A peak current of 12.5 mA is equivalent to ___.
A.	an rms value of 25 mA
B.	an average value of 12.5 mA
C.	a peak-to-peak value of 6.25 mA
D.	an average value of 7.96 mA
Answer» E.

Discussion

789.	The rms voltage value is a measure of a sine wave's heating effect.
A.	True
B.	False
Answer» B. False

Discussion

790.	The instantaneous voltage at 120 on a 5 V peak sine wave equals about 4.33 V.
A.	True
B.	False
Answer» C.

Discussion

791.	All periodic frequencies are derived by combining higher frequency ______________ called harmonics.
A.	sine waves
B.	pulse waves
C.	square waves
D.	sawtooth waves
Answer» B. pulse waves

Discussion

792.	An rms voltage of 5 V is equivalent to ___.
A.	14.14 V peak-to-peak
B.	a peak value of 5 V
C.	10 V peak-to-peak
D.	an average value of 7.07 V
Answer» B. a peak value of 5 V

Discussion

793.	A sine wave has only one positive maximum point during a cycle.
A.	True
B.	False
Answer» B. False

Discussion

794.	The sine of a given angle is equal to the ratio of the hypotenuse to the opposite side.
A.	True
B.	False
Answer» C.

Discussion

795.	The square, rectangular, and sawtooth waveforms are nonsymmetrical.
A.	True
B.	False
Answer» C.

Discussion

796.	10,000 cycles will occur in 5 s if a sine wave's frequency equals 2 kHz.
A.	True
B.	False
Answer» B. False

Discussion

797.	The term ______ is derived from a mathematical function in calculus.
A.	differentiator
B.	integrator
C.	filter
D.	voltage-divider
Answer» C. filter

Discussion

798.	A capacitor takes ___ time constants to charge to 95% of its capacity.
A.	2
B.	3
C.	4
D.	5
Answer» C. 4

Discussion

799.	The ___ of a capacitor affects the time it takes to charge and discharge.
A.	package style
B.	lead arrangement
C.	plate area
D.	voltage rating
Answer» D. voltage rating

Discussion

800.	The ______ the area of the plates, the greater the number of electrons and ______ that can be stored.
A.	larger, charge
B.	smaller, charge
C.	larger, polarity
D.	smaller, polarity
Answer» B. smaller, charge

Discussion

Explore topic-wise MCQs in Engineering.

What is the current through the capacitor in the given circuit?

What is the true power consumed in a 30 V series RLC circuit if Z = 20 ohms and R = 10 ohms?

What is the current phase angle for a parallel RLC circuit when IL = 15.3 A, IC = 0.43 A, and IR = 3.5 A?

At any resonant frequency, what voltage is measured across the two series reactive components?

What is the resonance frequency?

The voltage out when a 10 k load is connected is 5.7 volts.

When resistors burn out, they usually short.

Attaching a 6 k load to a voltage divider will cause a smaller decrease in the output voltage than will attaching a 5 k load.

A loaded voltage divider is a common application of a series-parallel circuit.

The total power is 10 watts.

The total resistance in the given circuit can be found using the formula: RT = R1 + R2 || R3 || R4.

When a load resistance is connected to the output of a voltage divider circuit, the source current increases.

Opens and shorts are typical problems that occur in electric circuits.

A Wheatstone bridge may be used to determine the value of an unknown resistance.

If the output voltage of a certain loaded voltage divider is 12 V, the output voltage might decrease when the load is removed.

If the Wheatstone bridge is balanced in the given circuit, the voltage between points A and B (VAB) equals the source voltage (VS).

The current through R6 is 8.5 mA.

Observed voltages not being shared identify components in parallel in a series parallel circuit.

R2 is open.

What is the range between f1 and f2 of an RLC circuit that resonates at 150 kHz and has a Q of 30?

When a full band of frequencies is allowed to pass through a filter circuit to the output, the resonant circuit is called a:

What is the resonant frequency in the given circuit?

Series RLC voltage or impedance totals must be calculated by:

What is the total current?

When XC = XL the circuit:

How much current will flow in a series RLC circuit when VT = 100 V, XL = 160 , XC = 80 , and R = 60 ?

What is the range between f1 and f2 of an RLC circuit that resonates at 150 kHz and has a Q of 30?

What is the quality factor?

What effect will a parallel tank have upon final filter current?

What is the total current?

When a parallel circuit resonates it is said to:

At resonance, the term bandwidth includes all frequencies that allow what percentage of maximum current to flow?

What is the voltage across the capacitor in the given circuit?

In a series RLC circuit the current can be found using:

The phase angle between the two waveforms in the given circuit equals _____.

If a sine wave's frequency equals 25 MHz, its period equals _____.

If a sine wave's period equals 50 ms, its frequency equals _____.

A peak current of 12.5 mA is equivalent to ___.

The rms voltage value is a measure of a sine wave's heating effect.

The instantaneous voltage at 120 on a 5 V peak sine wave equals about 4.33 V.

All periodic frequencies are derived by combining higher frequency ______________ called harmonics.

An rms voltage of 5 V is equivalent to ___.

A sine wave has only one positive maximum point during a cycle.

The sine of a given angle is equal to the ratio of the hypotenuse to the opposite side.

The square, rectangular, and sawtooth waveforms are nonsymmetrical.

10,000 cycles will occur in 5 s if a sine wave's frequency equals 2 kHz.

The term ______ is derived from a mathematical function in calculus.

A capacitor takes ___ time constants to charge to 95% of its capacity.

The ___ of a capacitor affects the time it takes to charge and discharge.

The ______ the area of the plates, the greater the number of electrons and ______ that can be stored.

The the area of the plates, the greater the number of electrons and that can be stored.