Worksheetselectronics 13th June
Total questions: 107
Worksheet time: 2hrs 47mins
Name
Class
Date
1.
SL100 is a _______
a)
PNP transistor
b)
NPN transistor
c)
Diode
d)
None of the above
2.
In an unbypassed amplifier, the first cut-off frequency of the frequency response is primarily determined by
a)
Cin
b)
Cout
c)
Rc
d)
None of the above
3.
BC107 is a ______
a)
PNP transistor
b)
NPN transistor
c)
Diode
d)
None of the above
4.
To get maximum voltage output from a transistor, the Q-point should be located at the _____________ of the load-line.
a)
center
b)
near saturation
c)
near cut-off
d)
None of the above
5.
In a transistorized Switch, Transistor is conducting means
a)
Transistor is ON
b)
Transistor is OFF
c)
Transistor is dead
d)
None of the above
6.
In a transistorized Switch, Transistor is not conducting means
a)
Transistor is ON
b)
Transistor is OFF
c)
Transistor is dead
d)
None of the above
7.
Typical VBE for a Germanium transistor when in active mode is
a)
0.7V
b)
0.3V
c)
0.1V
d)
1V
8.
β in a Transistor is
a)
Voltage Gain
b)
Current Gain
c)
Power Gain
d)
Supply
9.
Transistor can be thought of as
a)
Back to back connected two diodes
b)
Front to front connected two diodes
c)
Front to back connected two diodes
d)
None of the above.
10.
Output coupling capacitor is connected between the
a)
base and the source
b)
collector and load
c)
emitter and ground
d)
none of the above
11.
VCE is the voltage between
a)
base and emitter
b)
collector and ground
c)
collector and emitter
d)
collector and Vcc
12.
Transistor works as amplifier in
a)
active region
b)
saturation region
c)
cut-off region
d)
breakdown region
13.
-3dB point is also called
a)
half-power point
b)
full power point
c)
zero power point
d)
None of the above
14.
Bypass capacitor is connected between the
a)
base and the source
b)
collector and load
c)
emitter and ground
d)
none of the above
15.
VB is the voltage between Base terminal and
a)
emitter
b)
ground
c)
collector
d)
Vcc
16.
In current sinking, the regulating transistor connects
a)
the load to ground.
b)
the load to DC power supply.
c)
both a) and b).
d)
none of the above
17.
The common-mode gain of a Differential Amplifier should be ………..
a)
very high
b)
very low
c)
always unity
d)
unpredictable
18.
How the Slew Rate is represented in the data sheet of IC741v what is the unit of Slew Rate?
a)
V/ms
b)
V/s
c)
V/µs
d)
mv/S
19.
if the input is a rectangular pulse ,the output of an integrator is a_________
a)
sine wave
b)
square wave
c)
ramp
d)
rectangular
20.
Find the slew rate of op-amp from the output waveform given below
a)
3.4V/µs
b)
10V/µs
c)
20.66V/µs
d)
16V/µs
21.
Slew rate is defined as the rate of change of
a)
Output voltage with respect to time
b)
Input voltage with respect to time
c)
Both output input voltage with respect to time
d)
None of the mentioned
22.
How are the square wave output generated in op-amp____
a)
op-amp is forced to operate in the positive saturation
b)
op-amp is forced to operate in the negative saturation
c)
op-amp is forced to operate in the positive and negative saturation
d)
None of the above
23.
One of the main advantages of JFET as compared to BJT is:
a)
More current Gain
b)
More Input impedance
c)
Less frequency of operation
d)
None of the above
24.
To use P- Channel JFET, Source should be connected always to:
a)
Negative of the Supply
b)
Positive of the Supply
c)
Can be connected any way
d)
Not connected at all
25.
An oscillator differs from an amplifier because it________________
a)
Has more gain
b)
Required no input signal
c)
Required no dc supply
d)
Always has the same input
26.
Find the cut off frequency for an RC low pass filter of R=8.2Ω and C=0.0033μF
a)
6KHz
b)
5.88KHz
c)
4.26KHz
d)
7.91KHz
27.
The middle layer in PNP transistor is
a)
Emitter
b)
Collector
c)
Base
d)
VCC
28.
Ic is given by
a)
βIB
b)
βIE
c)
β(IB+IC)
d)
None of the above.
29.
Unbypassed amplifier means
a)
Cbp is connected
b)
Cbp is not connected
c)
Cin is not connected
d)
Cout is not connected
30.
Voltage gain is less than ONE in
a)
CC amplifier
b)
CB amplifier
c)
CE amplifier
d)
In all the above
31.
At cut-off frequencies, the power delivered to the load is
a)
half the power delivered in the flat region of the frequency response.
b)
half the power delivered in the flat region of the frequency response.
c)
Zero
d)
None of the above
32.
When the transistor saturates then the VCE of the transistor will be
a)
about less than 1 V
b)
equal to Vcc
c)
half the Vcc
d)
None of the above
33.
R1 and R2 are used to _______ the transistor in an amplifier.
a)
bias
b)
load
c)
saturate
d)
None of the above
34.
In a single ended differential amplifier, the gain is 10. If the input at the non-inverting terminal is DC 2 mV and the input at the inverting terminal is DC 10 mV then the output will be
a)
-80mV
b)
+80mV
c)
120mV
d)
None of the above
35.
A Differential Amplifier amplifies
a)
Difference of the Input signal
b)
Input voltage having only large voltage amplitudes
c)
High frequency signals only
d)
None of the mentioned above
36.
Zero crossing detector is also called as _____________
a)
square to sine wave generator
b)
sine to square wave generator
c)
sine to square wave generator
d)
None of the above
37.
A schmitt trigger ___________
a)
Zero-crossing detector
b)
has two trip point
c)
produces triangular output wave
d)
designed to trigger on noise voltage
38.
FET is ______Polar Transistor.
a)
Unipolar
b)
Bipolar
c)
Can be anything
d)
None of the above
39.
To use P- Channel JFET, Source should be connected always to:
a)
Negative of the Supply
b)
Positive of the Supply
c)
Can be connected any way
d)
Not connected at all
40.
Name the filter that has two stop bands
a)
Band Pass filter
b)
Low pass filter
c)
High pass filter
d)
Band reject filter
41.
BC107 is best used for
a)
High frequency audio amplifier
b)
Low frequency audio amplifier
c)
Power amplifier
d)
None of the above
42.
To get maximum voltage output from a transistor, the Q-point should be located at the _____________ of the load-line.
a)
centre
b)
near saturation
c)
near cut-off
d)
None of the above
43.
Typical VBE for a Silicon transistor when in active mode is
a)
0.7V
b)
0.3V
c)
0.1V
d)
1V
44.
IB is zero in
a)
Saturation region
b)
Cut off region
c)
Active region
d)
Breakdown region
45.
Input coupling capacitor is connected between the
a)
base and the source
b)
collector and load
c)
emitter and ground
d)
None of the above
46.
Vc is the voltage between Base terminal and
a)
emitter
b)
ground
c)
collector
d)
VCC
47.
VBE is the voltage between
a)
base and emitter
b)
base and ground
c)
collector and base
d)
base and Vcc
48.
The differential gain of a Differential Amplifier should be ………..
a)
very high
b)
very low
c)
dependent on input voltage
d)
about 100
49.
A MOSFET can be operated with ________________
a)
negative gate voltage
b)
positive gate voltage
c)
Both A & B
d)
none of the above
50.
For the operation of N-channel FET the Junction between the Gate and the Source should always be
a)
Forward Biased
b)
Reverse Biased
c)
Can be connected anyway
d)
None of the above
51.
One condition for oscillation is_________________
a)
phase shift around the feedback loop of 180˚
b)
gain around the feedback loop of one third
c)
phase shift around the feedback loop of 0˚
d)
gain around the feedback loop of less than 1
52.
Which filter attenuates any frequency outside the pass band_________________
a)
Band pass filter
b)
Band reject filter
c)
Band stop filter
d)
Band reject filter
53.
In a transistorized Switch, Transistor is OFF means
a)
Transistor is conducting
b)
Transistor is not conducting
c)
Transistor is dead
d)
None of the above
54.
Zin is more in
a)
CC amplifier
b)
CB amplifier
c)
CE amplifier
d)
In all the above amplifiers
55.
If the Q-point is located near the Cut-off Point then _______ portion of the output waveform will be cut-off.
a)
upper
b)
lower
c)
both
d)
None of the above
56.
DC load on a CE amplifier is
a)
Rc
b)
RE
c)
R1
d)
R2
57.
If the input at the non-inverting terminal is more +ve than the inverting terminal then the output of a single ended differential amplifier will be
a)
Inverted w.r.t the input
b)
In same phase with the input
c)
DC
d)
Either of a) and b) above
58.
In a digital circuit, Sourcing current refers to
a)
the ability of the digital output port to supply current.
b)
the ability of the port to receive current.
c)
both
d)
none of the above
59.
A comparator with a trip point of zero is sometimes called a _____________
a)
Threshold detector
b)
Zero-crossing detector
c)
positive limit detector
d)
half wave detector
60.
To use P- Channel JFET, Drain should be connected always to:
a)
Negative of the Supply
b)
Positive of the Supply
c)
Can be connected any way
d)
Not connected at all
61.
For the operation of N-channel FET the Junction between the Gate and the Source should always be:
a)
Forward Biased
b)
Reverse Biased
c)
Can be connected any way
d)
None of the mentioned above
62.
In a phase shift oscillator,we use ________RC sections
a)
1
b)
2
c)
3
d)
4
63.
In a phase shift oscillator,we use ________RC sections
a)
Damped oscillations
b)
Undamped oscillations
c)
Modulated oscillations
d)
None of the mentioned above
64.
Unbypassed amplifier means
a)
Cbp is connected
b)
Cbp is not connected
c)
Cin is not connected
d)
Cout is not connected
65.
In a transistorized Switch, Transistor is ON means
a)
Transistor is conducting
b)
Transistor is not conducting
c)
Transistor is dead
d)
None of the above
66.
Widely used Transistor configuration for voltage amplification is
a)
CB
b)
CC
c)
CE
d)
None of the above
67.
In ideal Differential Amplifier, if same signal is given to both inputs, then output will be
a)
Same as input
b)
Double the input
c)
Not equal to zero
d)
Zero
68.
A Differential Amplifier should have collector resistor’s value (RC1 & RC2) as
a)
5kΩ, 5kΩ
b)
5Ω, 10kΩ
c)
5Ω, 5kΩ
d)
5kΩ, 10kΩ
69.
For the operation of P-channel FET the Junction between the Gate and the Source should always be:
a)
Reverse Biased
b)
Forward Biased
c)
Can be connected anyway
d)
None of the above
70.
An oscillator employs ____________ feedback.
a)
negative
b)
positive
c)
neither positive nor negative
d)
data insufficient
71.
VE is the voltage between Base terminal and
a)
emitter
b)
ground
c)
collector
d)
Vcc
72.
If the input at the inverting terminal is more +ve than the non-inverting terminal then the output of a single ended differential amplifier will be
a)
Inverted w.r.t the input
b)
In same phase with the input
c)
DC
d)
Either of a) and b) above
73.
In a digital circuit, Sink current refers to
a)
the ability of the digital output port to supply current
b)
the ability of the port to receive current
c)
both a) and b)
d)
none of the above
74.
if the input is a rectangular pulse ,the output of an integrator is a_________
a)
sine wave
b)
square wave
c)
ramp
d)
rectangular
75.
To use N- Channel JFET, Drain should be connected always to:
a)
Positive of the Supply
b)
Negative of the Supply
c)
Can be connected any way
d)
Not connected at all
76.
If the Q-point is located near the Saturation Point then _______ portion of the output waveform will be cut-off.
a)
upper
b)
lower
c)
both
d)
None of the above
77.
A MOSFET is sometimes called ____________ JFET
a)
Many gate
b)
open gate
c)
Insulated gate
d)
Shorted gate
78.
What are the two types of mosfet
a)
Depleation &enhancement
b)
Passive & Active
c)
gate &source
d)
unipolar and bipolar
79.
A filter is a ______________ circuit
a)
Amplitude selective
b)
Frequency damping
c)
Amplitude damping
d)
Frequency selective
80.
In the common mode, ……………
a)
both inputs are grounded
b)
the outputs are connected together
c)
an identical signal appears on both the inputs
d)
the output signal are in-phase
81.
In current Sourcing, the regulating transistor connects
a)
the load to ground
b)
the load to DC power supply
c)
both a) and b)
d)
none of the above
82.
When a differential amplifier is operated with single-ended input then
a)
the output is grounded
b)
one input is grounded, and signal is applied to the other
c)
both inputs are connected together
d)
the output is not inverted
83.
To use N- Channel JFET Source should be connected always to:
a)
Positive of the Supply
b)
Negative of the Supply
c)
Can be connected any way
d)
Not connected at all
84.
One of the main advantages of BJT as compared to FET is:
a)
More Input Impedance
b)
More frequency of operation
c)
More Voltage Gain
d)
None of the above
85.
Current mirror circuit is used
a)
when a constant current is needed in the load
b)
to give voltage
c)
to increase the range of frequency
d)
none of the above
86.
Bypassed amplifier means
a)
Cbp is connected
b)
Cbp is not connected
c)
Cin is not connected
d)
Cout is not connected
87.
Vc is the voltage between Base terminal and
a)
emitter
b)
ground
c)
collector
d)
Vcc
88.
-3dB point is also called as
a)
half-power point
b)
full power point
c)
zero power point
d)
None of the above
89.
In the common mode, ……………
a)
both inputs are grounded
b)
the outputs are connected together
c)
an identical signal appears on both the inputs
d)
the output signal are in-phase
90.
In a digital circuit, Sink current refers to
a)
the ability of the digital output port to supply current.
b)
the ability of the port to receive current.
c)
both a) and b).
d)
none of the above.
91.
The differential gain of a Differential Amplifier should be ………..
a)
very high
b)
very low
c)
dependent on input voltage
d)
about 100
92.
Zero crossing detector is also called as _____________
a)
square to sine wave generator
b)
sine to square wave generator
c)
sine to square wave generator
d)
None of the above
93.
if the input is a rectangular pulse ,the output of an integrator is a_________
a)
sine wave
b)
square wave
c)
ramp
d)
rectangular
94.
One of the main advantages of JFET as compared to BJT is:
a)
More current Gain
b)
More Input impedance
c)
Less frequency of operation
d)
None of the above
95.
An oscillator employs ____________ feedback.
a)
negative
b)
positive
c)
neither positive nor negative
d)
data insufficient
96.
In differential-mode
a)
it is not necessary to opposite polarity signals at the input terminals
b)
the gain is one
c)
the outputs are of different amplitudes
d)
only one supply voltage is used
97.
How are the square wave output generated in op-amp____
a)
op-amp is forced to operate in the positive saturation
b)
op-amp is forced to operate in the negative saturation
c)
op-amp is forced to operate in the positive and negative saturation
d)
None of the above
98.
How the Slew Rate is represented in the data sheet of IC741v what is the unit of Slew Rate?
a)
V/ms
b)
V/s
c)
V/µs
d)
mv/S
99.
For the operation of N-channel FET the Junction between the Gate and the Source should always be:
a)
Forward Biased
b)
Reverse Biased
c)
Can be connected anyway
d)
None of the above
100.
To use N- Channel JFET Source should be connected always to:
a)
Positive of the Supply
b)
Negative of the Supply
c)
Can be connected any way
d)
Not connected at all
101.
Which filter attenuates any frequency outside the pass band_________________
a)
Band pass filter
b)
Band reject filter
c)
Band stop filter
d)
Band reject filter
102.
Find the slew rate of op-amp from the output waveform given below
a)
3.4V/µs
b)
10V/µs
c)
20.66V/µs
d)
16V/µs
103.
To use P- Channel JFET, Source should be connected always to:
a)
Negative of the Supply
b)
Positive of the Supply
c)
Can be connected any way
d)
Not connected at all
104.
An oscillator differs from an amplifier because it________________
a)
Has more gain
b)
Required no input signal
c)
Required no dc supply
d)
Always has the same input
105.
To use P- Channel JFET, Drain should be connected always to:
a)
Negative of the Supply
b)
Positive of the Supply
c)
Can be connected any way
d)
Not connected at all
106.
Find the cut off frequency for an RC low pass filter of R=8.2Ω and C=0.0033μF
a)
6KHz
b)
5.88KHz
c)
4.26KHz
d)
7.91KHz
107.
A differential amplifier is capable of amplifying
a)
DC input signal only
b)
AC input signal only
c)
AC & DC input signal
d)
None of the above
100 %
