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what is the value of Beta in power BJT?
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asked
Sep 20, 2017
by
anonymous
What is the value of Beta in power BJT?
beta
value
power
bjt
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answered
Sep 20, 2017
by
anonymous
The beta value in power BJT is 5 to 10.
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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
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answers
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
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1
answer
asked
Mar 19, 2018
by
anonymous
What is the maximum value of power factor?
What is the maximum value of power factor?
Last answer:
1 is the maximum value of power factor.
maximum
value
power
factor
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79
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1
answer
asked
Feb 6, 2018
by
anonymous
Explain the formation of parasitic BJT and parasitic diode in Power MOSFET.
Explain the formation of parasitic BJT and parasitic diode in Power MOSFET. Can parasitic diode be used in same power electronics applications?
Last answer:
Parasitic Diode: The parasitic diode is in between drain and source. The MOSFET structure itself contains parasitic diode or body drain diode. This parasitic diode allows the reverse flow of current when the ... of MOSFET as a BJT collector. Parasitic BJT operates in the cut-off region.
parasitic
diode
bjt
power
mosfet
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asked
Sep 15, 2017
by
anonymous
why IGBT is preferred as a power switch over both power BJT and MOSFET?
Last answer:
Because it has a higher switching frequency and heat tolerance.
igbt
bjt
mosfet
power
switch
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1
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asked
Mar 20, 2018
by
anonymous
For high value of diversity factor, a power station of given installed capacity will be in a position to supply?
Last answer:
For high value of diversity factor, a power station of given installed capacity will be in a position to supply more number of consumers.
high
value
diversity
factor
power
station
installed
capacity
position
supply
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1
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asked
Mar 20, 2018
by
anonymous
The value of starting capacitor of a fractional horse power motor will be?
Last answer:
The value of starting capacitor of a fractional horse power motor will be 300 uF .
value
starting
capacitor
fractional
horse
power
motor
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1
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asked
Sep 15, 2017
by
anonymous
Explain the on state losses in power BJT.
Explain the on state losses in power BJT.
Last answer:
On state losses in power BJT: Transistor have four types of losses one is turn on state losses second is turn off state losses third is turn on switching losses and fourth is turn ... ON = VCE sat x IC With increasing collector current collector to emitter saturation voltage increases.
bjt
on
state
losses
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1
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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
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1
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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
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asked
Mar 19, 2018
by
anonymous
What is a BJT amplifier?
What is a BJT amplifier?
bjt
amplifier
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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
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2
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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
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1
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asked
Sep 27, 2017
by
anonymous
what are the three operating regions of BJT?
Last answer:
Active , Saturation , Cut-off region of operations in BJT.
operating
regions
bjt
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Sep 10, 2017
by
anonymous
what does bjt stand for?
Last answer:
Bipolar junction transistor
bjt
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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
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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
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1
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asked
Mar 24, 2018
by
anonymous
The r.m.s. value and mean value is the same in the case of?
The r.m.s. value and mean value is the same in the case of?
Last answer:
The r.m.s. value and mean value is the same in the case of square wave.
rms
value
mean
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1
answer
asked
Dec 9, 2017
by
anonymous
What is the meaning of RMS value?
What is the meaning of RMS value?
Last answer:
RMS value means root mean square value. It is 0.707 times peak value of voltage or current. The ammeter and voltmeter records this rms value. RMS value for sine wave is more than average value. RMS ... same amount of heat as produce by AC when AC is flowing through the same resistance for same time.
rms
value
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2
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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
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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
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712
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1
answer
asked
Mar 25, 2018
by
anonymous
In the case of an unsymmetrical alternating current the average value must always be taken over?
In the case of an unsymmetrical alternating current the average value must always be taken over?
Last answer:
In the case of an unsymmetrical alternating current the average value must always be taken over the whole cycle.
unsymmetrical
alternating
current
average
value
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106
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1
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asked
Sep 5, 2018
by
anonymous
Draw circuit diagram of voltage divider biasing list two advantages of voltage divider biasing of BJT.
Draw circuit diagram of voltage divider biasing list two advantages of voltage divider biasing of BJT.
Last answer:
Two advantages of voltage divider biasing of BJT. 1. It is very simple method of transistor biasing. 2. The biasing conditions can be very easily set. 3. there is no loading of ... 5. The resistor RE introduces a negative feedback. So all the advantages of negative feedback are obtained.
voltage
divider
biasing
advantages
bjt
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1
answer
asked
Mar 25, 2018
by
anonymous
In an AC. circuit, a low value of kVAR compared with kW indicates?
In an AC. circuit, a low value of kVAR compared with kW indicates?
Last answer:
In an AC. circuit, a low value of kVAR compared with kW indicates high power factor.
ac
circuit
low
value
kvar
compared
kw
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349
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1
answer
asked
Apr 28, 2018
by
anonymous
Which phenomenon is present in thyristors but absent in BJT, MOSFET and IGBT ?
Which phenomenon is present in thyristors but absent in BJT, MOSFET and IGBT ? (A) forward conduction (B) latching (C) forward blocking (D) reverse breakdown
Last answer:
Which phenomenon is present in thyristors but absent in BJT, MOSFET and IGBT ? (A) forward conduction (B) latching (C) forward blocking (D) reverse breakdown
thyristors
bjt
mosfet
igbt
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1
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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
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1
answer
asked
Sep 5, 2018
by
anonymous
Compare BJT with FET
Compare BJT with FET
Last answer:
FET BJT It is unipolar device i.e. current in the device is carried either by electrons or holes It is bipolar device i.e. current in the device is carried either by ... from minority- carrier storage effects & therefore has lower switching speeds & cut-off frequencies.
compare
bjt
fet
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1
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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
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2
answers
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
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91
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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
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2
answers
asked
May 3, 2018
by
anonymous
For a round wire, the approximate value of fusing current is given by
For a round wire, the approximate value of fusing current is given by
Last answer:
For a round wire, the approximate value of fusing current is given by K√d3
round
wire
value
fusing
current
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109
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1
answer
asked
Mar 25, 2018
by
anonymous
The equation of 50 Hz current sine wave having r.m.s. value of 60 A is?
The equation of 50 Hz current sine wave having r.m.s. value of 60 A is?
Last answer:
(60*√2)Sin(2π*50*t)
equation
current
sine
wave
rms
value
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743
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2
answers
asked
Mar 25, 2018
by
anonymous
The r.m.s. value of pure cosine function is?
The r.m.s. value of pure cosine function is?
Last answer:
0.707 of peak value
rms
value
pure
cosine
function
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225
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2
answers
asked
Mar 24, 2018
by
anonymous
The r.m.s. value of a sinusoidal A.C. current is equal to its value at an angle of______degrees.
The r.m.s. value of a sinusoidal A.C. current is equal to its value at an angle of______degrees.
Last answer:
The r.m.s. value of a sinusoidal A.C. current is equal to its value at an angle of 45 degrees.
rms
sinusoidal
ac
current
value
angle
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484
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1
answer
asked
Mar 24, 2018
by
anonymous
The peak value of a sine wave is 200 V. Its average value is?
Last answer:
The peak value of a sine wave is 200 V. Its average value is 127.4 V.
peak
value
sine
wave
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180
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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
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150
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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
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297
views
1
answer
asked
Apr 20, 2020
by
anonymous
If the 12 Ohm resistor draws a current of 1 A as shown in the figure, the value of resistance R is
If the 12 Ohm resistor draws a current of 1 A as shown in the figure, the value of resistance R is
Last answer:
.embed-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; } .embed-container iframe, .embed-container object, .embed-container embed { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }
if
the
12
ohm
resistor
draws
a
current
of
1
as
shown
in
figure
value
resistance
r
is
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252
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2
answers
asked
Sep 13, 2017
by
anonymous
why igbt is used instead of bjt and mosfet?
Last answer:
ON state losses of IGBT is less as compared to MOSFET and BJT.
igbt
bjt
mosfet
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110
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1
answer
asked
May 8, 2018
by
anonymous
Which of the following connection of transformers will give highest value of secondary voltage ?
Which of the following connection of transformers will give highest value of secondary voltage ? (A) Delta primary delta secondary (B) Delta primary star secondary (C) Star primary star secondary (D) Star primary delta secondary
Last answer:
Which of the following connection of transformers will give highest value of secondary voltage ? (A) Delta primary delta secondary (B) Delta primary star secondary (C) Star primary star secondary (D) Star primary delta secondary
connection
transformers
highest
value
secondary
voltage
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110
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1
answer
asked
May 8, 2018
by
anonymous
True value has been 50 whereas measured value is 40 then the percentage error in the reading
True value has been 50 whereas measured value is 40 then the percentage error in the reading will be ______. (A) 20% (B) 40% (C) 50% (D) 30%
Last answer:
True value has been 50 whereas measured value is 40 then the percentage error in the reading will be 20%.
true
value
measured
percentage
error
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71
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1
answer
asked
Apr 28, 2018
by
anonymous
In a 5 bit weighted resistor D/A converters, the resistor value corresponding to LSB is 40 kΩ, and the resistor
In a 5 bit weighted resistor D/A converters, the resistor value corresponding to LSB is 40 kΩ, and the resistor value corresponding to MSB will be (A) 0.4 kΩ (B) 3 kΩ (C) 2.8 kΩ (D) 2.5 kΩ
Last answer:
In a 5 bit weighted resistor D/A converters, the resistor value corresponding to LSB is 40 kΩ, and the resistor value corresponding to MSB will be 2.5 kΩ
weighted
resistor
converters
value
corresponding
lsb
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46
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1
answer
asked
Mar 20, 2018
by
anonymous
In a two value capacitor motor, the capacitor used for running purposes is?
Last answer:
In a two value capacitor motor, the capacitor used for running purposes is paper spaced oil filled type.
two
value
capacitor
motor
used
running
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81
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1
answer
asked
Aug 17, 2019
by
anonymous
Define : i) Maximum Value ii) RMS Value of ac supply
Define : i) Maximum Value ii) RMS Value of ac supply
Last answer:
i) Maximum Value :- The maximum or peak value attained by an alternating quantity during positive or negative half cycle, is called maximum value or peak value. ii) RMS Value of ac ... as produced by the alternating current when flowing through the same resistance and for the same time.
maximum
value
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44
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1
answer
asked
Jul 30, 2019
by
anonymous
Define : i) Average value ii) RMS value of an AC Wave.
Define : i) Average value ii) RMS value of an AC Wave.
Last answer:
i) Average value: The average value is defined as the average of all instantaneous values during one alternation . That is, the ratio of the sum of all considered instantaneous values to the ... as produced by the alternating current when flowing through the same resistance for the same time.
average
value
rms
ac
wave
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87
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1
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asked
Jun 11, 2019
by
anonymous
Instantaneous value of a sine wave voltage
Instantaneous value of a sine wave voltage
Last answer:
Instantaneous value of a sine wave voltage
instantaneous
value
of
a
sine
wave
voltage
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81
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1
answer
asked
Jul 24, 2019
by
anonymous
State reason BJT is called as bipolar junction transistor.
State reason BJT is called as bipolar junction transistor.
Last answer:
BJT is called bipolar junction transistor because in BJT current conduction takes place due to majority as well as minority charge carriers.
bjt
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4.9k
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1
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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
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552
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
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2.6k
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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
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4
answers
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