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Can we use triac in multiquadrant chopper?
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asked
Mar 6, 2018
by
anonymous
triac
multiquadrant
chopper
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answered
Mar 6, 2018
by
anonymous
Yes,
we can use triac in the multi-quadrant chopper.
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asked
Dec 31, 2017
by
anonymous
In a thyristor D.C. chopper, which type of commutation results in best performance ?
In a thyristor D.C. chopper, which type of commutation results in best performance ?
Last answer:
voltage commutation
commutation
chopper
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1.2k
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2
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asked
Apr 30, 2018
by
anonymous
A dc chopper is fed from a constant voltage mains the duty ratio of chopper is progressively increased while
A dc chopper is fed from a constant voltage mains the duty ratio of chopper is progressively increased while the chopper feeds an RL load. The per unit current ripple would (1) increase progressively (2) decrease progressively (3) decrease to a minimum value at α = 0.5 and then increase (4) increase to a maximum value at α = 0.5 and then decrease
Last answer:
A dc chopper is fed from a constant voltage mains the duty ratio of chopper is progressively increased while the chopper feeds an RL load. The per unit current ripple would increase to a maximum value at α = 0.5 and then decrease
dc
chopper
constant
voltage
duty
ratio
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1
answer
asked
Feb 15, 2018
by
anonymous
Explain two quadrant chopper.
Explain two-quadrant chopper.........
Last answer:
Two quadrant chopper: There are two semiconductor controllable switches in the two-quadrant chopper. Two quadrant type A chopper: The figure shows the type A chopper. Both the switch never turn on at ... 2 are turned on then Vo=Vs. When chopper 1 and chopper 2 are off then Vo=-Vs.
two
quadrant
chopper
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1
answer
asked
May 21, 2020
by
anonymous
With neat sketch explain four modes of operation of a TRIAC?
With neat sketch explain four modes of operation of a TRIAC?
Last answer:
Modes of operation of a TRIAC: There are four different operating modes of TRIAC: 1) MT2 and gate are positive with respect to terminal MT1(Mode1) : Here terminal MT2 is positive ... junction P2-N2 is forward biased, current carriers are injected and therefore, the TRIAC is turned on.
modes
operation
triac
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1
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asked
Oct 13, 2019
by
anonymous
Draw symbol & V-I characteristics of (i) LASCR (ii) DIAC (iii) TRIAC
Draw symbol & V-I characteristics of (i) LASCR (ii) DIAC (iii) TRIAC
Last answer:
(i) LASCR: (ii) DIAC: (iii) TRIAC:
symbol
v-i
characteristics
lascr
diac
triac
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673
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1
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asked
Oct 13, 2019
by
anonymous
Speed control of the motor using TRIAC
Speed control of the motor using TRIAC
Last answer:
Speed control of the motor using TRIAC: This basic phase triggering circuit uses the triac in series with the motor across an AC sinusoidal supply. The variable resistor, VR1 is used ... meaning that it may not trigger at the exact same point for each positive and negative half cycle.
speed
control
motor
triac
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210
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1
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asked
Oct 13, 2019
by
anonymous
Compare SCR and TRIAC
Compare SCR and TRIAC
Last answer:
SCR TRIAC It is an unidirectional device. It is a bidirectional device. It is turned-on by only positive gate current. It can be turned-on by either ... applications including lamp dimmer, heating control, zero voltage switched AC relay, small AC motor control etc.
scr
triac
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78
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1
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asked
Jul 25, 2019
by
anonymous
Draw the symbol of GTO and TRIAC.
Draw the symbol of GTO and TRIAC.
Last answer:
1) GTO: 2) TRIAC:
triac
gto
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345
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1
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asked
Apr 29, 2018
by
anonymous
SCR is more utilized as compared to Triac because it is
SCR is more utilized as compared to Triac because it is
Last answer:
SCR is more utilized as compared to Triac because it is available with higher ratings
scr
triac
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64
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1
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asked
Feb 16, 2018
by
anonymous
Describe triggering circuit for TRIAC using DIAC.
Describe triggering circuit for TRIAC using DIAC.
Last answer:
Triggering circuit for TRIAC using DIAC: DIAC stands for diode alternating current. It's a two terminal four layer bidirectional device. It conducts in both directions. DIAC is used for triggering TRIAC. ... of DIAC to the gate terminal of TRIAC reduces the harmonics.
describe
triggering
circuit
triac
diac
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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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559
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1
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asked
Aug 25, 2017
by
anonymous
Chopper controlled DC motor
Chopper controlled DC motor
Last answer:
Chopper controlled DC motor
chopper
controlled
dc
motor
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158
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1
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asked
Mar 15, 2018
by
anonymous
How do you test a triac?
How do you test a triac?
test
triac
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asked
Aug 6, 2017
by
anonymous
What is TRIAC?
What is TRIAC?
Last answer:
TRIAC Structure: Operating Principle: A triac is a three terminal, five layer semiconductor device. It is equivalent to two separate SCRs connected in anti-parallel with gates common. ... for electric fans and other electric motors. v. Heating control vi. Zero voltage switched relay
triac
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3
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asked
Dec 9, 2017
by
anonymous
Can we use a zener diode as a rectifier?
Can we use a zener diode as a rectifier?
Last answer:
Yes we can use zener diode as rectifier but it have limitations better to use normal diode. Zener diode have some different applications.
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diode
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asked
Jun 4, 2018
by
anonymous
A TRIAC can be switched into on-state by
A TRIAC can be switched into on-state by (A) positive gate current only (B) negative gate current only (C) positive or negative gate current (D) sinusoidal gate current
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asked
May 23, 2018
by
anonymous
TRIAC is an ac switch which can be made to conduct on
TRIAC is an ac switch which can be made to conduct on
Last answer:
TRIAC is an ac switch which can be made to conduct on both half cycle of AC voltage.
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1
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asked
Mar 21, 2018
by
anonymous
To avoid the effect of stray magnetic field in A.C. bridges we can use?
Last answer:
To avoid the effect of stray magnetic field in A.C. bridges we can use magnetic screening.
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110
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1
answer
asked
Jul 21, 2019
by
anonymous
How can we use CT and PT for protection purpose?
How can we use CT and PT for protection purpose?
Last answer:
CT and PT for Protection purpose: Current transformer (CT) and Potential transformer (PT) are instrument transformers, which are used in conjunction with protective relays for protection purpose. The CT ... from the healthy part. In this way the CT and PT can be used for protection purpose.
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1
answer
asked
Mar 21, 2018
by
anonymous
For measurement of mutual inductance we can use?
Last answer:
For measurement of mutual inductance we can use Heaviside bridge.
measurement
mutual
inductance
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103
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1
answer
asked
Mar 18, 2018
by
anonymous
Can we use the synchronous motor as the synchronous capacitor?
Can we use the synchronous motor as the synchronous capacitor?
Last answer:
Yes, we can use the synchronous motor as the synchronous capacitor when the synchrnous motor is overexcited.
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motor
capacitor
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77
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1
answer
asked
Sep 30, 2017
by
anonymous
can we use potentiometer for measuring resistance?
Last answer:
Yes we can use potentiometer for measuring resistance.
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57
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1
answer
asked
Jun 4, 2018
by
anonymous
The duty ratio of a step-up chopper with an output voltage of 200 V from a 80 V dc source, is
The duty ratio of a step-up chopper with an output voltage of 200 V from a 80 V dc source, is (A) 0.4 (B) 0.5 (C ) 0.6 (D) 1.5
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0
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asked
May 22, 2018
by
anonymous
Triac are usually operated at:
Triac are usually operated at:
Last answer:
Triac are usually operated at: power frequency
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871
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1
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asked
May 20, 2018
by
anonymous
A triac is a device which acts as a
A triac is a device which acts as a A) Diode in forward direction and thrylistor in the reverse direction B) Thyristor in both directions C) Diode in both directions D) Thyristor in forward direction and diode in reverse direction
Last answer:
A triac is a device which acts as a Thyristor in both directions
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1
answer
asked
Mar 31, 2018
by
anonymous
The efficiency of a chopper can be expected in the range
Last answer:
The efficiency of a chopper can be expected in the range 92 to 99 percent.
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1
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asked
Oct 10, 2020
by
anonymous
How much time we should use mobile in a day ?
How much time we should use mobile in a day ?
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42
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0
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asked
Mar 11, 2018
by
anonymous
Why do we use AC current in our homes?
Why do we use AC current in our homes?
Last answer:
We used it for cooking rice, For washing clothes and for lights in the house.
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ac
current
homes
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174
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3
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asked
Aug 18, 2017
by
anonymous
why we use aluminium conductor and not copper in transmission lines ?
why we use aluminium conductor and not copper in transmission lines ?
Last answer:
Because copper conductor are costlier than aluminium conductor
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82
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1
answer
asked
5 days
ago
by
anonymous
For extinguishing fire, we use (1) Hydrogen (2) Carbon Monoxide (3) Carbon Dioxide (4) Marsh gas
For extinguishing fire, we use (1) Hydrogen (2) Carbon Monoxide (3) Carbon Dioxide (4) Marsh gas
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Carbon Dioxide
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1
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asked
Jan 20
by
anonymous
During washing of clothes, we use indigo due to its (1) better cleaning action (2) proper pigmental composition (3) high glorious nature (4) very low cost
During washing of clothes, we use indigo due to its (1) better cleaning action (2) proper pigmental composition (3) high glorious nature (4) very low cost
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proper pigmental composition
physics
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1
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Jul 16, 2020
by
anonymous
Why do we use 50 Hz or 60 Hz only ?
Why do we use 50 Hz or 60 Hz only ?
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18
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0
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asked
Aug 21, 2019
by
anonymous
when charging a battery we use a DC supply but not an AC supply. Why ?
when charging a battery we use a DC supply but not an AC supply. Why ?
Last answer:
When power is supplied to the battery, electrolyte inside the battery is divided into positive and negative ions, where ions with similar pole is gained in one side. This reactionʼs flow coincides with direct current.
charging
battery
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80
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1
answer
asked
May 13, 2018
by
anonymous
____ is the mode we use to execute the instruction from a computer.
____ is the mode we use to execute the instruction from a computer. a) Sequential b) Parallel c) Both (a) & (b) d) None of the above
Last answer:
____ is the mode we use to execute the instruction from a computer. a) Sequential b) Parallel c) Both (a) & (b) d) None of the above
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125
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1
answer
asked
Mar 29, 2018
by
anonymous
For attenuation of high frequencies we should use
Last answer:
For attenuation of high frequencies we should use shunt capacitance.
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39
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1
answer
asked
Mar 28, 2018
by
anonymous
For measuring emf of a standard cell we use:
Last answer:
For measuring emf of a standard cell we use: Potentiometer
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69
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1
answer
asked
Mar 28, 2018
by
anonymous
For eliminating the effect of earth capacitance from the bridge network we use:
Last answer:
For eliminating the effect of earth capacitance from the bridge network we use: Wagner’s earthing device
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81
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1
answer
asked
Mar 21, 2018
by
anonymous
For measurement of inductance having high value, we should use?
Last answer:
For measurement of inductance having high value, we should use Hay's bridge.
measurement
inductance
high
value
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126
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1
answer
asked
Mar 21, 2018
by
anonymous
For measuring a very high resistance we should use?
Last answer:
For measuring a very high resistance we should use Meggar.
measuring
high
resistance
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87
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1
answer
asked
Mar 21, 2018
by
anonymous
For measuring current at high frequency we should use?
Last answer:
For measuring current at high frequency we should use thermocouple instrument.
measuring
current
high
frequency
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87
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1
answer
asked
Mar 11, 2018
by
anonymous
Why do we use Gauss elimination method?
Why do we use Gauss elimination method?
use
gauss
elimination
method
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82
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0
answers
asked
Mar 11, 2018
by
anonymous
Why do we use VLSI?
Why do we use VLSI?
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VLSI is Very Large Scale Integration. VLSI is very useful for compact design. More functionalities in smaller size. VLSI IC have small power consumption as compared to discrete components circuit. VLSI can be use for different functions in compact size.
use
vlsi
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132
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1
answer
asked
Mar 10, 2018
by
anonymous
What do we use to generate electricity?
What do we use to generate electricity?
Last answer:
Use wind turbines. In a windy seashore we set up some wind turbines. But when the place is not windy we got no electricity.
use
generate
electricity
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154
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2
answers
asked
Mar 10, 2018
by
anonymous
Why do we use automation?
Why do we use automation?
use
automation
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54
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0
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asked
Mar 10, 2018
by
anonymous
How do we use nuclear energy to generate electricity?
How do we use nuclear energy to generate electricity?
Last answer:
nuclear energy is produce by nuclei of atom
use
nuclear
energy
generate
electricity
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143
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2
answers
asked
Mar 19, 2018
by
anonymous
What is the use of a thyristor in a circuit?
What is the use of a thyristor in a circuit?
use
thyristor
circuit
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0
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asked
5 days
ago
by
anonymous
When a metal is heated in a flame, the electrons absorb energy and jump to higher energy state. On coming back to the lower energy siate, they emit light, which we can observe in (1) Raman spectra (2) Absorption spectra (3) Emission spectra (4) Fluorescence
When a metal is heated in a flame, the electrons absorb energy and jump to higher energy state. On coming back to the lower energy siate, they emit light, which we can observe in (1) Raman spectra (2) Absorption spectra (3) Emission spectra (4) Fluorescence
Last answer:
Emission spectra
chemistry
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4
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1
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Jan 13
by
anonymous
Suppose if we measure the time lapse between the two Sunsets by sitting in the beach, from this we can estimate (1) The distance between the sun and the earth (2) The depth of the ocean (3) The radius of the earth (4) The radius of the sun
Suppose if we measure the time lapse between the two Sunsets by sitting in the beach, from this we can estimate (1) The distance between the sun and the earth (2) The depth of the ocean (3) The radius of the earth (4) The radius of the sun
Last answer:
The radius of the earth
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4
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1
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asked
Oct 15, 2020
by
anonymous
What can we expect from you in your first three months?
What can we expect from you in your first three months?
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18
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Nov 16, 2019
by
Sagar behara
How we can reduce losses in DC machines????
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