WorksheetsEC8452-EC-II::Quiz-4-Wave Shaping & MVB Ckts.
Total questions: 30
Worksheet time: 30mins
A relay is ……….. switch
A mechanical
An electronic
An electro-mechanical
None of the above
A switch has ........
One state
Two states
Three states
None of the above
The switch that has the fastest speed of operation is ………….. switch
Electronic
Mechanical
Electromechanical
None of the above
The most inexpensive switch is ………….. switch
Electronic
Mechanical
Electromechanical
None of the above
In a multivibrator, we have ………. feedback.
Negative
100 % positive
Both positive and negative
None of the above
If the input to an integrating circuit is a succession of alternating positive and negative pulses of very short duration, the output will be …………… wave
Rectangular
Triangular
Sine
Square
A negative clipper removes the ……………… half-cycles of the input voltage
Negative
Positive
Both positive and negative
None of the above
When the transistor (CE arrangement) is in the cut off region, the collector current is ……………..
ICBO
ICEO
(β + 1) ICEO
IC(sat)
When a transistor is used as an amplifier, it is operated in the ……………… region
Off
Saturation
Active
None of the above
One would find a clamping circuit in ………………..
Receiving antenna
Radio transmitter
Radio receiver
Television receiver
When a rectangular voltage waveform is applied to a capacitor, then the current waveform is ……………
Rectangular
Sinusoidal
Sawtooth
Square
For a differentiating circuit to be effective, the RC product should be ………… the time period of the input wave
Equal to
5 times greater than
5 times smaller than
At least 10 times greater than
The multivibrator which generates square wave of its own is the ………… multivibrator
Monostable
Monostable
Astable
None of the above
A monostable vibrator has …………..
No stable state
One stable state
Two stable states
None of the above
A differentiating circuit is a simple RC circuit with output taken across …………..
R
C
Both R and C
None of the above
An integrating circuit is a simple RC series circuit with output taken across ………
Both R and C
R
C
None of the above
If a square wave is fed to a differentiating circuit, the output will be …………
Sine wave
Sharp narrow pulses
Rectangular wave
Triangular wave
A bistable multivibrator has …………..
Two stable states
One stable state
No stable state
None of the above
If the input to a differentiating circuit is a saw-tooth wave, then output will be …………
Square
Triangular
Sine
Rectangular
If d.c. supply of 10 V is fed to a differentiating circuit, then output will be …….
20 V
10 V
0 V
None of the above
An astable multivibrator has ………….
One stable state
Two stable states
No stable state
None of the above
………………. multivibrator is a square wave oscillator
Monostable
Astable
Bistable
None of the above
When a transistor is driven to cut off, ideally the output is …………..
VCC
0
VCC/2
VCC/3
A relay is superior to a mechanical switch because it ……………
Is relatively inexpensive
Does not require moving contacts
Combines control with power amplification
None of the above
The maximum speed of electronic switch can be ………….. operations per second
104
10
1000
109
When a transistor is driven to saturation, ideally the output is ………………
VCC
0 V
VCC/2
2VCC
The main disadvantage of a mechanical switch is that it………….
Is operated mechanically
Is costly
Has high inertia
None of the above
What happens if the threshold voltages are made longer than the noise voltages in schmitt trigger?
Enhance the output signal
Reduce the transition effect
Eliminate false output transition
None of the above
In which configuration a dead band condition occurs in schmitt trigger
Differential amplifier with positive feedback
Voltage follower with positive feedback
Comparator with positive feedback
None of the mentioned
A clamping circuits adds ………………… component to the signal
DC.
AC
both DC and AC
none of the above
