Discuss
menu
search
person
Login
Register
search
edit
Ask a Question
Discuss
All Activity
Q&A
Questions
Hot!
Unanswered
Tags
Ask a Question
what are the three operating regions of BJT?
asked
Sep 27, 2017
by
anonymous
operating
regions
bjt
thumb_up_alt
0
like
thumb_down_alt
0
dislike
2.5k
views
Please
log in
or
register
to add a comment.
Please
log in
or
register
to answer this question.
2
Answers
answered
Sep 27, 2017
by
anonymous
The three operating regions of BJT are cutoff region, active region, saturation region.
thumb_up_alt
0
like
thumb_down_alt
0
dislike
Please
log in
or
register
to add a comment.
answered
May 22, 2018
by
Neha8235
Active , Saturation , Cut-off region of operations
in BJT.
thumb_up_alt
0
like
thumb_down_alt
0
dislike
Please
log in
or
register
to add a comment.
← Prev Question
Next Question →
Related questions
asked
Feb 3, 2018
by
anonymous
Operating frequency of power MOSFET is higher than that of power BJT. Justify the statement.
Operating frequency of power MOSFET is higher than that of power BJT. Justify the statement.
Last answer:
Power MOSFET have high turning on and turning off capability high switching speed of MOSFET is due to the high rate of change of drain voltage. The switching losses of power MOSFET ... lower frequency. Hence, operating frequency of power MOSFET is higher than that of power BJT.
mosfet
bjt
frequency
operating
thumb_up_alt
2
like
thumb_down_alt
0
dislike
692
views
1
answer
asked
Sep 27, 2017
by
anonymous
in which BJT operating region both the junctions are reverse biased?
Last answer:
In cut-off region of BJT both the emitter-base junction and collector-base junction are reverse biased.
bjt
region
reverse
bias
junction
thumb_up_alt
0
like
thumb_down_alt
0
dislike
60
views
2
answers
asked
Sep 10, 2017
by
anonymous
what are bjt amplifiers used for?
Last answer:
Transformer coupled amplifiers Direct coupled amplifiers Multistage amplifiers Darlington amplifiers Emmiter follower
bjt
amplifiers
used
thumb_up_alt
1
like
thumb_down_alt
0
dislike
68
views
1
answer
asked
Sep 10, 2017
by
anonymous
what are bjt transistors?
Last answer:
Bjt transistor is a type of transistor which uses both electrons and hole charge carrier.bjts are used as switches and amplifiers.They amplify currents.
bjt
thumb_up_alt
0
like
thumb_down_alt
0
dislike
81
views
1
answer
asked
Mar 10, 2018
by
anonymous
What is a BJT?
What is a BJT?
Last answer:
Bipolar Junction Transistor (BJT): BJT is a Bipolar device. (Uses both electrons and holes charge carrier for current conduction) Two Junctions (Emitter junction & collector ... mode (Current amplification) Cutoff mode (Open switch) Saturation mode (Close switch)
bjt
thumb_up_alt
0
like
thumb_down_alt
0
dislike
709
views
2
answers
asked
Sep 10, 2017
by
anonymous
what is bjt biasing?
Last answer:
The proper flow of zero signal collector current and the maintenance of the proper collector emmiter voltage during passage of single called as transistor biasing
bjt
biasing
thumb_up_alt
1
like
thumb_down_alt
0
dislike
68
views
1
answer
asked
Sep 10, 2017
by
anonymous
bjt what is beta ?
Last answer:
Beta is the current gain which is the ratio of collector current to base current.
bjt
beta
thumb_up_alt
0
like
thumb_down_alt
0
dislike
52
views
1
answer
asked
Sep 10, 2017
by
anonymous
what does bjt stand for?
Last answer:
Bipolar junction transistor
bjt
thumb_up_alt
1
like
thumb_down_alt
0
dislike
75
views
1
answer
asked
Jun 18, 2018
by
anonymous
The command line interpreter that enables the users to interact with operating system is called the
The command line interpreter that enables the users to interact with operating system is called the A) Window B) Shell C) Process D) Kernel
Last answer:
The command line interpreter that enables the users to interact with operating system is called the Shell
command
line
interpreter
interact
operating
system
thumb_up_alt
0
like
thumb_down_alt
0
dislike
63
views
1
answer
asked
Apr 30, 2018
by
anonymous
A minimum clearance of 6.3 m to ground is required for overhead lines when operating voltages are :
A minimum clearance of 6.3 m to ground is required for overhead lines when operating voltages are : (A) less than 66 kV (B) lie between 66 kV and 110 kV (C) more than 165 kV (D) lie between 110 kV and 165 kV
Last answer:
A minimum clearance of 6.3 m to ground is required for overhead lines when operating voltages are : lie between 66 kV and 110 kV
minimum
ground
overhead
lines
operating
voltages
thumb_up_alt
0
like
thumb_down_alt
0
dislike
100
views
1
answer
asked
Mar 21, 2018
by
anonymous
Operating torques in analogue instruments are?
Last answer:
Operating torques in analogue instruments are deflecting, control and damping.
operating
torques
analogue
instruments
thumb_up_alt
0
like
thumb_down_alt
0
dislike
85
views
1
answer
asked
Sep 27, 2017
by
anonymous
does the BJT have internal capacitance?
Last answer:
Yes BJT have internal capacitances.
bjt
internal
capacitance
thumb_up_alt
0
like
thumb_down_alt
0
dislike
60
views
1
answer
asked
Apr 29, 2018
by
anonymous
What is the power factor when a single phase watt meter operating on 200 V and 5 A for 5 hours makes 2016
What is the power factor when a single phase watt meter operating on 200 V and 5 A for 5 hours makes 2016 revolutions and the meter constant in revolution is 420? A) 0.04 B) 1.04 C) 0.96 D) None of these
Last answer:
What is the power factor when a single phase watt meter operating on 200 V and 5 A for 5 hours makes 2016 revolutions and the meter constant in revolution is 420? A) 0.04 B) 1.04 C) 0.96 D) None of these
power
factor
single
phase
watt
meter
operating
thumb_up_alt
0
like
thumb_down_alt
0
dislike
135
views
1
answer
asked
Apr 26, 2018
by
anonymous
An FET is a better chopper than a BJT because it has
An FET is a better chopper than a BJT because it has (A) lower offset voltage (B) higher series ON resistance (C) lower input current (D) higher input impedance
Last answer:
An FET is a better chopper than a BJT because it has lower offset voltage
fet
bjt
chopper
thumb_up_alt
0
like
thumb_down_alt
0
dislike
539
views
1
answer
asked
Sep 29, 2017
by
anonymous
is IGBT costlier than BJT and MOSFET?
Last answer:
Yes IGBT is costlier than BJT and MOSFET.
igbt
bjt
mosfet
thumb_up_alt
0
like
thumb_down_alt
0
dislike
2.6k
views
1
answer
asked
Sep 27, 2017
by
anonymous
in which region BJT act as a switch?
Last answer:
BJT act as switch in saturation and cutoff region ( ON state in saturation region and OFF state in cut-off region )
bjt
region
switch
thumb_up_alt
0
like
thumb_down_alt
0
dislike
90
views
2
answers
asked
Sep 27, 2017
by
anonymous
in which region BJT act as amplifier?
Last answer:
Active region of BJT act as amplifier.
bjt
region
amplifier
thumb_up_alt
0
like
thumb_down_alt
0
dislike
92
views
2
answers
asked
Sep 23, 2017
by
anonymous
Does BJT have second breakdown problem?
Last answer:
Yes BJT have second breakdown problem.
bjt
second
breakdown
problem
thumb_up_alt
0
like
thumb_down_alt
0
dislike
79
views
1
answer
asked
Sep 23, 2017
by
anonymous
Is BJT current controlled or voltage controlled?
Last answer:
BJT is current controlled device.
bjt
controlled
device
thumb_up_alt
3
like
thumb_down_alt
0
dislike
121
views
4
answers
asked
Sep 21, 2017
by
anonymous
BJT have how many terminals?
Last answer:
BJT have three terminals Base, emitter and collector.
bjt
terminals
thumb_up_alt
0
like
thumb_down_alt
0
dislike
89
views
1
answer
asked
Sep 10, 2017
by
anonymous
why bjt is called current controlled device?
Last answer:
In BJT there is movement of electrons and holes accros the junctions which is basicaly current flow.
controlled
current
bjt
thumb_up_alt
1
like
thumb_down_alt
0
dislike
289
views
2
answers
asked
Sep 10, 2017
by
anonymous
when bjt is in cutoff ?
Last answer:
When Q-point is at cut off region means it is just above the horizontal axis VCE
bjt
cutoff
thumb_up_alt
1
like
thumb_down_alt
0
dislike
82
views
1
answer
asked
Sep 10, 2017
by
anonymous
bjt is active or passive?
Last answer:
BJT control the flow of electron so it is a active device.
bjt
active
passive
thumb_up_alt
0
like
thumb_down_alt
0
dislike
92
views
1
answer
asked
Sep 10, 2017
by
anonymous
is bjt a voltage controlled device ?
Last answer:
No, BJT is a current controlled device .
bjt
voltage
controlled
device
thumb_up_alt
0
like
thumb_down_alt
0
dislike
155
views
1
answer
asked
Sep 20, 2017
by
anonymous
what is the value of Beta in power BJT?
What is the value of Beta in power BJT?
Last answer:
The beta value in power BJT is 5 to 10.
beta
value
power
bjt
thumb_up_alt
1
like
thumb_down_alt
0
dislike
83
views
1
answer
asked
Mar 19, 2018
by
anonymous
What is the difference between BJT and FET?
What is the difference between BJT and FET?
Last answer:
BJT is a current opperated transistor while FET is a field opperated transistor.
difference
between
bjt
fet
thumb_up_alt
0
like
thumb_down_alt
0
dislike
2.6k
views
1
answer
asked
Feb 20, 2018
by
anonymous
What is the difference between beta and forced beta for BJT?
What is the difference between beta and forced beta for BJT?
difference
between
bjt
beta
forced
thumb_up_alt
0
like
thumb_down_alt
0
dislike
518
views
0
answers
asked
Mar 19, 2018
by
anonymous
What is a BJT amplifier?
What is a BJT amplifier?
bjt
amplifier
thumb_up_alt
0
like
thumb_down_alt
0
dislike
75
views
0
answers
asked
Sep 5, 2018
by
anonymous
Explain the operating principle of LASER and list applications of LASER diode.
Explain the operating principle of LASER and list applications of LASER diode.
Last answer:
A basic construction of Laser diode is as shown . A PN junction is formed by two layers of doped gallium arsenide. There is highly reflective surface at one end of PN junction and ... 6. laser scanning and light beam illumination. 7. Military applications 8. Medical surgery 9.Diamond cutting
operating
principle
laser
applications
diode
thumb_up_alt
0
like
thumb_down_alt
0
dislike
202
views
1
answer
asked
May 8, 2018
by
anonymous
The operating point of a protective current transformer is near the
The operating point of a protective current transformer is near the
Last answer:
The operating point of a protective current transformer is near the Ankle point
operating
point
protective
current
transformer
thumb_up_alt
0
like
thumb_down_alt
0
dislike
84
views
1
answer
asked
May 3, 2018
by
anonymous
The operating time of instantaneous relay is
The operating time of instantaneous relay is
Last answer:
The operating time of instantaneous relay is 0.1 sec
operating
time
instantaneous
relay
thumb_up_alt
0
like
thumb_down_alt
0
dislike
91
views
1
answer
asked
Apr 28, 2018
by
anonymous
The no-load speed of a single-phase SCR bridge converter fed separately excited dc motor operating at a
The no-load speed of a single-phase SCR bridge converter fed separately excited dc motor operating at a firing delay angle, α and flux, Φ (A) directly proportional to α and Φ (B) inversely proportional to α and Φ (C) directly proportional to α and inversely proportional to Φ (D) directly proportional to Φ and inversely proportional to α
Last answer:
The no-load speed of a single-phase SCR bridge converter fed separately excited dc motor operating at a firing delay angle, α and flux, Φ directly proportional to α and inversely proportional to Φ
no-load
speed
single-phase
scr
bridge
converter
fed
separately
excited
dc
motor
operating
thumb_up_alt
0
like
thumb_down_alt
0
dislike
122
views
1
answer
asked
Apr 28, 2018
by
anonymous
Two synchronous generators operating in parallel supply a common load of 2.5 MW. The frequency-power
Two synchronous generators operating in parallel supply a common load of 2.5 MW. The frequency-power characteristics have a common slope of 1 MW/Hz and the no-load frequencies of the generators are 51.5 Hz and 51.0 Hz, respectively. Then the system frequency is (A) 50 Hz (B) 51 Hz (C) 51.25 Hz (D) 51.5 Hz
Last answer:
Two synchronous generators operating in parallel supply a common load of 2.5 MW. The frequency-power characteristics have a common slope of 1 MW/Hz and the no-load frequencies of the generators are 51.5 Hz and 51.0 Hz, respectively. Then the system frequency is 50 Hz
synchronous
generators
operating
thumb_up_alt
0
like
thumb_down_alt
0
dislike
82
views
1
answer
asked
Mar 21, 2018
by
anonymous
The operating voltage of a meggar is about?
Last answer:
The operating voltage of a meggar is about 100 V.
operating
voltage
meggar
thumb_up_alt
0
like
thumb_down_alt
0
dislike
50
views
1
answer
asked
Mar 20, 2018
by
anonymous
The operating speed of a synchronous motor can be changed to new fixed value by?
Last answer:
The operating speed of a synchronous motor can be changed to new fixed value by changing frequency.
operating
speed
synchronous
motor
fixed
value
thumb_up_alt
0
like
thumb_down_alt
0
dislike
83
views
1
answer
asked
Mar 19, 2018
by
anonymous
The secondary of a current transformer is always short-circuited under operating conditions because it?
The secondary of a current transformer is always short-circuited under operating conditions because it?
Last answer:
The secondary of a current transformer is always short-circuited under operating conditions because it avoids core saturation and high voltage induction.
secondary
current
transformer
short-circuited
operating
conditions
thumb_up_alt
0
like
thumb_down_alt
0
dislike
74
views
1
answer
asked
Oct 13, 2019
by
anonymous
operating principle of PUT.
operating principle of PUT.
Last answer:
Constructional diagram & Operating principle of PUT: The PUT is a PNPN device similar to SCR, but its operation is similar to the UJT. The PUT behave like a UJT whose trigger voltage VP can be set ... low resistance and VAK ≈ 1V). The PUT is also referred to as a complementary SCR (CSCR).
operating
principle
put
thumb_up_alt
0
like
thumb_down_alt
0
dislike
71
views
1
answer
asked
Sep 6, 2018
by
anonymous
Draw construction of Megger and write operating principle of it.
Draw construction of Megger and write operating principle of it.
Last answer:
Megger: Working: Two coils the current coil and pressure coil are mounted at an angle on the same spindle and form the part of the moving system. These coils are connected to a small hand driven ... . When the instrument is not working the pointer may rest at any position on the dial.
construction
megger
operating
principle
thumb_up_alt
0
like
thumb_down_alt
0
dislike
215
views
2
answers
asked
Mar 20, 2018
by
anonymous
Annual operating expenditure of a power plant consists of?
Last answer:
Annual operating expenditure of a power plant consists of fixed charges, semi-fixed charges, running charges.
annual
operating
expenditure
power
plant
thumb_up_alt
0
like
thumb_down_alt
0
dislike
49
views
1
answer
asked
Apr 29, 2018
by
anonymous
In a single-phase induction motor, the operating direction is determined by the ________
In a single-phase induction motor, the operating direction is determined by the ________ A) Rotor B) Stator C) Starting circuit D) None of these
Last answer:
In a single-phase induction motor, the operating direction is determined by the Starting circuit
single-phase
induction
motor
operating
direction
thumb_up_alt
0
like
thumb_down_alt
0
dislike
78
views
1
answer
asked
Mar 20, 2018
by
anonymous
To limit the operating temperature an electrical machine should have proper?
Last answer:
To limit the operating temperature an electrical machine should have proper current rating.
limit
operating
temperature
electrical
machine
thumb_up_alt
0
like
thumb_down_alt
0
dislike
60
views
1
answer
asked
Mar 19, 2018
by
anonymous
The relay operating speed depends upon?
Last answer:
The relay operating speed depends upon the spring tension, the rate of flux built up, armature core air gap.
relay
operating
speed
thumb_up_alt
0
like
thumb_down_alt
0
dislike
194
views
1
answer
asked
May 20, 2019
by
anonymous
Transistor operating configurations
Transistor operating configurations
Last answer:
Transistor operating configurations
transistor
operating
configurations
thumb_up_alt
0
like
thumb_down_alt
0
dislike
44
views
1
answer
asked
Apr 28, 2018
by
anonymous
In a 230 V, 50 Hz single-phase SCR bridge converter operating at a firing delay angle, α and with large R-L load,
In a 230 V, 50 Hz single-phase SCR bridge converter operating at a firing delay angle, α and with large R-L load, the input source current is (A) sinusoidal current (B) constant dc current (C) continuous rectangular pulses (D) alternating rectangular pulses
Last answer:
In a 230 V, 50 Hz single-phase SCR bridge converter operating at a firing delay angle, α and with large R-L load, the input source current is alternating rectangular pulses
single-phase
scr
bridge
converter
operating
thumb_up_alt
0
like
thumb_down_alt
0
dislike
115
views
1
answer
asked
Apr 28, 2018
by
anonymous
A 230 V/460 V single-phase transformer operating at 20 A and unity power factor has primary referred
A 230 V/460 V single-phase transformer operating at 20 A and unity power factor has primary referred resistance of 0.2 Ω and reactance of 0.5 Ω. The approximate primary induced emf is (A) 216 V (B) 226 V (C) 234 V (D) 236 V
Last answer:
A 230 V/460 V single-phase transformer operating at 20 A and unity power factor has primary referred resistance of 0.2 Ω and reactance of 0.5 Ω. The approximate primary induced emf is 226 V
single-phase
transformer
operating
thumb_up_alt
0
like
thumb_down_alt
0
dislike
85
views
1
answer
asked
Mar 19, 2018
by
anonymous
For a transformer, operating at constant load current, maximum efficiency will occur at?
For a transformer, operating at constant load current, maximum efficiency will occur at?
Last answer:
For a transformer, operating at constant load current, maximum efficiency will occur at unity power factor.
transformer
operating
constant
load
current
maximum
efficiency
thumb_up_alt
0
like
thumb_down_alt
0
dislike
89
views
1
answer
asked
Sep 5, 2018
by
anonymous
State the need of biasing of BJT.
State the need of biasing of BJT.
Last answer:
Need of biasing: The basic need of transistor biasing is to keep the base-emitter (B-E) junction properly forward biased and the collector-emitter (C-E) junction properly reverse biased ... transistor biasing is necessary for normal and proper operation of transistor to be used for amplification.
state
need
biasing
bjt
thumb_up_alt
0
like
thumb_down_alt
0
dislike
105
views
2
answers
asked
Sep 5, 2018
by
anonymous
Compare between BJT and FET on the basis of (i) Biolar/Unipolar (ii) Tharmal Runaway (iii) Noise (iv) Applications
Compare between BJT and FET on the basis of (i) Biolar/Unipolar (ii) Tharmal Runaway (iii) Noise (iv) Applications
Last answer:
Parameter BJT FET Bipolar/Unipolar It is bipolar device i.e. current in this device is carried by electrons and holes. It is unipolar device i.e. current ... in oscilloscopes, electronic voltmeters and other measuring and testing equipment because of their high input impedance.
bjt
fet
biolar
unipolar
tharmal
runaway
noise
applications
thumb_up_alt
0
like
thumb_down_alt
0
dislike
712
views
1
answer
asked
Jun 18, 2018
by
anonymous
If the base current of a BJT is 250 µA and emitter current is 15 mA, then the common base current gain will be
If the base current of a BJT is 250 µA and emitter current is 15 mA, then the common base current gain will be A) 0.98 B) 0.41 C) 59 D) 55
Last answer:
If the base current of a BJT is 250 µA and emitter current is 15 mA, then the common base current gain will be 0.98
bjt
emitter
current
common
base
gain
thumb_up_alt
0
like
thumb_down_alt
0
dislike
147
views
1
answer
asked
Mar 19, 2018
by
anonymous
Is the input impedance of MOSFET more than BJT and FET?
Is the input impedance of MOSFET more than BJT and FET?
Last answer:
Yes, the input impedance of MOSFET more than BJT and FET.
input
impedance
mosfet
bjt
fet
thumb_up_alt
0
like
thumb_down_alt
0
dislike
293
views
1
answer
Install Now
...