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Explain various performance parameter used to evaluate the quality of inverters.
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asked
Mar 10, 2018
by
anonymous
Explain various performance parameter used to evaluate the quality of inverters.
performance
parameter
used
evaluate
quality
inverters
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asked
Apr 30, 2018
by
anonymous
A voltage source inverter will have better performance if its
A voltage source inverter will have better performance if its (1) load inductance is small and source inductance is large. (2) both load and source inductance are small. (3) both load and source inductances are large. (4) load inductance is large and source inductance is small.
Last answer:
A voltage source inverter will have better performance if its load inductance is large and source inductance is small.
voltage
source
inverter
performance
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1
answer
asked
May 8, 2018
by
anonymous
In case the height of transmission tower is increased, which of the following parameter is likely to change?
In case the height of transmission tower is increased, which of the following parameter is likely to change? (A) Resistance (B) Inductance (C) Capacitance (D) None of the above
Last answer:
In case the height of transmission tower is increased, which of the following parameter is likely to change? (A) Resistance (B) Inductance (C) Capacitance (D) None of the above
transmission
tower
parameter
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1
answer
asked
Apr 2, 2020
by
anonymous
Apply phasor analysis to evaluate the following
Apply phasor analysis to evaluate the following
Last answer:
Apply phasor analysis to evaluate the following
apply
phasor
analysis
to
evaluate
the
following
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51
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1
answer
asked
Apr 1, 2020
by
anonymous
Evaluate the following complex numbers
Evaluate the following complex numbers
Last answer:
Evaluate the following complex numbers
evaluate
the
following
complex
numbers
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50
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1
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asked
Mar 31, 2020
by
anonymous
Evaluate the following quantities and express your results in polar form
Evaluate the following quantities and express your results in polar form
Last answer:
Evaluate the following quantities and express your results in polar form
evaluate
the
following
quantities
and
express
your
results
in
polar
form
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1
answer
asked
Mar 30, 2020
by
anonymous
Evaluate the following complex numbers and leave your results in polar form
Evaluate the following complex numbers and leave your results in polar form
Last answer:
Evaluate the following complex numbers and leave your results in polar form
evaluate
the
following
complex
numbers
and
leave
your
results
in
polar
form
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1
answer
asked
May 6, 2020
by
anonymous
State the impact of inductance and resistance on transmission line performance
State the impact of inductance and resistance on transmission line performance
Last answer:
Impact of inductance on transmission line: 1) It causes IXL drop in transmission line which affects regulation. 2) It is the only parameter which decides power transmission capacity of line i. ... is very small, it causes losses, temperature rise& poor voltage regulation so it cannot be neglected
state
the
impact
of
inductance
and
resistance
on
transmission
line
performance
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1
answer
asked
May 3, 2020
by
anonymous
Analyze the effect of supply voltage on performance of LED as regards current, Lumen output, efficacy and life.
Analyze the effect of supply voltage on performance of LED as regards current, Lumen output, efficacy and life.
Last answer:
1) Effect on Current:- In LED current depends upon supply voltage, if voltage get changes then current also change but this change in current will be control by resistors which are connected in series. 2) ... 4) Effect on Life:- If supply voltage is not stable then life of LED get reduced.
analyze
the
effect
of
supply
voltage
on
performance
led
as
regards
current
lumen
output
efficacy
and
life
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answer
asked
Aug 25, 2019
by
anonymous
effect of inductance and capacitance on performance of transmission line.
effect of inductance and capacitance on performance of transmission line.
Last answer:
Following are the effect on performance of transmission line: 1. Due to inductance (L) voltage drop in transmission line produces. 2. Capacitor (C) draws charging current ... , transmission line efficiency, voltage regulation & also power factor of transmission line gets affected.
inductance
capacitance
performance
transmission
line
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1
answer
asked
Sep 22, 2018
by
anonymous
Explain energy conservation technique “by improving power quality” for induction motor.
Explain energy conservation technique “by improving power quality” for induction motor.
Last answer:
Energy conservation method in induction motor by improving power quality: Electrical energy can be conserved by improving the power quality. It can be achieved by avoiding voltage unbalance, maintaining ... losses can be minimized by using harmonic filter thus reducing the harmonics in the system.
energy
conservation
technique
improving
power
quality
induction
motor
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2
answers
asked
Sep 10, 2017
by
anonymous
how to monitor power quality?
Last answer:
By applying various power quality monitoring devices and using telecommunication technique .
monitor
power
quality
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135
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1
answer
asked
May 3, 2018
by
anonymous
The self GMD method is used to evaluate
The self GMD method is used to evaluate
Last answer:
The self GMD method is used to evaluate inductance and capacitance
self
gmd
method
used
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396
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1
answer
asked
Mar 10, 2018
by
anonymous
What are the power quality disturbance?
What are the power quality disturbance?
power
quality
disturbance
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0
answers
asked
Mar 10, 2018
by
anonymous
What are the different power quality issues?
What are the different power quality issues?
different
power
quality
issues
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0
answers
asked
Aug 31, 2018
by
anonymous
Quality control is aimed at:
Quality control is aimed at: a. Maintaining the desired quality b. Exceeding the desired quality c. Continuously improving the quality d. Following the quality
Last answer:
Quality control is aimed at: a. Maintaining the desired quality b. Exceeding the desired quality c. Continuously improving the quality d. Following the quality
quality
control
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67
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1
answer
asked
Mar 10, 2018
by
anonymous
What is harmonic in power quality?
What is harmonic in power quality?
harmonic
power
quality
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47
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0
answers
asked
Mar 10, 2018
by
anonymous
What is a power quality analyzer?
What is a power quality analyzer?
power
quality
analyzer
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434
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0
answers
asked
Mar 10, 2018
by
anonymous
What is power quality meter?
What is power quality meter?
power
quality
meter
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0
answers
asked
Mar 10, 2018
by
anonymous
What is good power quality?
What is good power quality?
good
power
quality
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53
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0
answers
asked
Mar 10, 2018
by
anonymous
What is power quality monitoring?
What is power quality monitoring?
power
quality
monitoring
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60
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0
answers
asked
Sep 10, 2017
by
anonymous
why power quality is important?
Last answer:
Power quality is important because the electrical appliances will works better and will be safer and less loss in energy. Low energy waste and improves stability of power system .
power
quality
important
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1
answer
asked
Mar 10, 2018
by
anonymous
Explain the electrical losses of magnetic materials used for the cores of inductors and transformer.
Explain the electrical losses of magnetic materials used for the cores of inductors and transformer.
electrical
losses
magnetic
materials
used
cores
inductors
transformer
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68
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0
answers
asked
May 3, 2020
by
anonymous
Enlist the luminaries used in factory lighting and lux level required in various areas.
Enlist the luminaries used in factory lighting and lux level required in various areas.
Last answer:
Area Luminaries Lux level Office building Fluorescent tube, LED, CFL 500 lux Testing centre Fluorescent tube, LED, CFL 400 to 500 lux Workshop/work place Halogen ... , LED, CFL, Projector lamp, filament lamp, Halogen Lamp, Metal Halide lamp etc Above 600 Lux
enlist
the
luminaries
used
in
factory
lighting
and
lux
level
required
various
areas
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57
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1
answer
asked
Mar 19, 2018
by
anonymous
How is a thyristor used to convert AC to DC?
How is a thyristor used to convert AC to DC?
thyristor
used
convert
ac
dc
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96
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0
answers
asked
Jun 18, 2018
by
anonymous
Which of the following thyristors can be used for high frequency of operation?
Which of the following thyristors can be used for high frequency of operation? A) TRIAC B) DIAC C) SCR D) GTO
Last answer:
Which of the following thyristors can be used for high frequency of operation? A) TRIAC B) DIAC C) SCR D) GTO
thyristors
used
high
frequency
operation
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81
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1
answer
asked
Jan 2
by
anonymous
Draw a neat sketch and explain the accessory used to support long work.
Draw a neat sketch and explain the accessory used to support long work.
Last answer:
Accessory to support long work: A steady rest is a tool for a lathe, enabling a machinist to make deep cuts in long, slender stock, bore out thin pieces of metal, and generally keeps thin stuff straight. ... tool that follows the cutter, a steady rest is firmly attached to the bed of a lathe.
accessory
used
support
long
work
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18
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1
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asked
Mar 6, 2018
by
anonymous
String efficiency is used for measuring the?
Last answer:
String efficiency is used for measuring the degree of utilization of SCR.
string
efficiency
used
measuring
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109
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1
answer
asked
May 3, 2018
by
anonymous
Which circuit is used as amplitude comparator?
Which circuit is used as amplitude comparator?
Last answer:
Schmitt trigger circuit is used as amplitude comparator.
circuit
used
amplitude
comparator
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188
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1
answer
asked
Aug 25, 2019
by
anonymous
effect of line parameter on performance of transmission line.
effect of line parameter on performance of transmission line.
Last answer:
Following are the effect of line parameter on performance of transmission line: 1. Due to resistance (R), voltage drop in transmission line & copper losses in transmission line ... transmission line efficiency, voltage regulation & also power factor of transmission line gets affected.
transmission
line
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45
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1
answer
asked
May 8, 2018
by
anonymous
A _________ is used to measure the stator % winding temperature of the generator.
A _________ is used to measure the stator % winding temperature of the generator. (A) Thermocouple (B) Pyrometer (C) Resistance thermometer (D) Thermometer
Last answer:
A Resistance thermometer is used to measure the stator % winding temperature of the generator.
used
measure
stator
winding
temperature
generator
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2.9k
views
1
answer
asked
Apr 30, 2018
by
anonymous
Which of the following gates can be used to realize all possible combinational logic functions?
Which of the following gates can be used to realize all possible combinational logic functions? (i) OR gate (ii) NOR gate (iii) Exclusive OR gate (iv) NAND gate (v) AND gate (A) (iii), (iv) and (v) (B) (i), (iii) and (iv) (C) (ii) and (iv) (D) (i) and (v)
Last answer:
Which of the following gates can be used to realize all possible combinational logic functions? (i) OR gate (ii) NOR gate (iii) Exclusive OR gate (iv) NAND gate (v) AND gate (A) (iii), (iv) and (v) (B) (i), (iii) and (iv) (C) (ii) and (iv) (D) (i) and (v)
gates
used
combinational
logic
functions
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84
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1
answer
asked
Apr 29, 2018
by
anonymous
Which of the following can be used to measure the capacitance of a capacitor?
Which of the following can be used to measure the capacitance of a capacitor? A) Rheostat B) Schering bridge C) Wheatstone bridge D) None of these
Last answer:
Which of the following can be used to measure the capacitance of a capacitor? A) Rheostat B) Schering bridge C) Wheatstone bridge D) None of these
used
measure
capacitance
capacitor
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2.7k
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1
answer
asked
Apr 28, 2018
by
anonymous
The ALE line of an 8085 microprocessor is used to
The ALE line of an 8085 microprocessor is used to (A) latch the output of an I/O instruction into an external latch. (B) deactivate the chip-select signal from memory devices. (C) find the interrupt enable states of the TRAP interrupt. (D) latch the 8 bits of address lines AD7-AD0 into an external latch.
Last answer:
The ALE line of an 8085 microprocessor is used to latch the 8 bits of address lines AD7-AD0 into an external latch.
ale
line
8085
microprocessor
used
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115
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1
answer
asked
Mar 15, 2018
by
anonymous
Which type of starter is used to start the DC motor?
Which type of starter is used to start the DC motor?
type
starter
used
start
dc
motor
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59
views
0
answers
asked
May 24, 2018
by
anonymous
Consider the following statements with regard to inverters 1. Line commutated inverters can function as
Consider the following statements with regard to inverters 1. Line commutated inverters can function as isolated ac sources 2. Force commutated inverters can provide independent ac voltage with adjustable voltage and frequency 3. Thyrister based inverters do not require additional circuitry for commutation 4. IGBT, PMOSFET based inverters are more reliable, less costly and less complex. The correct statements are A)1,3 B)1,3,4 C) 2,4 D) 1,4
Last answer:
Consider the following statements with regard to inverters 1. Line commutated inverters can function as isolated ac sources 2. Force commutated inverters can provide independent ac voltage with adjustable voltage and frequency 3. ... correct statements are A)1,3 B)1,3,4 C) 2,4 D) 1,4
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65
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1
answer
asked
May 8, 2018
by
anonymous
Wave trap is used to trap waves of:
Wave trap is used to trap waves of: (A) Power frequencies (B) Higher frequencies entering generator or transformer units (C) All of the above (D) None of the above
Last answer:
Wave trap is used to trap waves of: Higher frequencies entering generator or transformer units
used
trap
waves
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90
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1
answer
asked
Mar 20, 2018
by
anonymous
A.C. network analyser is used to solve problems of?
Last answer:
A.C. network analyser is used to solve problems of load flow, short-circuit and stability.
ac
network
analyser
used
solve
problems
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114
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1
answer
asked
Mar 20, 2018
by
anonymous
Wave trap is used to trap waves of?
Last answer:
Wave trap is used to trap waves of higher frequencies entering generator or transformer units.
wave
trap
used
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49
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1
answer
asked
Mar 10, 2018
by
anonymous
What type of meter is used to measure current?
What type of meter is used to measure current?
Last answer:
Ammeter
type
meter
used
measure
current
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2.6k
views
3
answers
asked
Apr 30, 2018
by
anonymous
IDMT relays are used to protect the transformer against :
IDMT relays are used to protect the transformer against : (A) Internal short -circuits (B) Open circuits (C) External short circuits (D) Oil leakage
Last answer:
IDMT relays are used to protect the transformer against : External short circuits
idmt
relays
used
protect
transformer
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2.7k
views
1
answer
asked
Apr 29, 2018
by
anonymous
An unshielded moving iron voltmeter is used to measure the voltage in an AC circuit. The stray DC magnetic
An unshielded moving iron voltmeter is used to measure the voltage in an AC circuit. The stray DC magnetic field having a component along the axis will be (1) unaffected (2) decreased (3) increased (4) either decreased or increased depending on the direction of the DC field
Last answer:
An unshielded moving iron voltmeter is used to measure the voltage in an AC circuit. The stray DC magnetic field having a component along the axis will be either decreased or increased depending on the direction of the DC field
unshielded
moving
iron
voltmeter
used
measure
voltage
ac
circuit
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263
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1
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asked
Apr 29, 2018
by
anonymous
The iron alloy, ALNICO is mainly used to make ________
The iron alloy, ALNICO is mainly used to make ________ A) Temporary magnets B) Permanent magnets C) Transmission lines D) None of these
Last answer:
The iron alloy, ALNICO is mainly used to make Permanent magnets
iron
alloy
alnico
used
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55
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1
answer
asked
Mar 20, 2018
by
anonymous
The bearings used to support the rotor shafts are generally?
Last answer:
The bearings used to support the rotor shafts are generally ball bearings.
bearings
used
rotor
shafts
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74
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1
answer
asked
Mar 18, 2018
by
anonymous
The damping winding in synchronous motor is generally used to?
The damping winding in synchronous motor is generally used to?
Last answer:
The damping winding in synchronous motor is generally used to provide starting torque and prevent hunting.
damping
winding
synchronous
motor
used
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121
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1
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asked
May 8, 2018
by
anonymous
Shunt compensation in an EHV line is used to
Shunt compensation in an EHV line is used to (A) Improve stability. (B) Improve the voltage profile. (C) Reduce the fault level. (D) Substitute for synchronous phase modifier.
Last answer:
Shunt compensation in an EHV line is used to Improve the voltage profile.
shunt
compensation
ehv
line
used
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4.1k
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1
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asked
Apr 29, 2018
by
anonymous
A dummy strain gage is used in a quarter bridge strain gage circuit to :
A dummy strain gage is used in a quarter bridge strain gage circuit to : (A) compensate for changes in temperature and lead wire resistance (B) produce more output voltage from the bridge (C) increase the sensitivity of the bridge (D) compensate lead wire resistance only
Last answer:
A dummy strain gage is used in a quarter bridge strain gage circuit to : compensate for changes in temperature and lead wire resistance
dummy
strain
gage
used
quarter
bridge
circuit
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70
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1
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asked
Apr 29, 2018
by
anonymous
In a dc machine, interpoles are used to
In a dc machine, interpoles are used to (1) neutralize the effect of armature reaction in the interpolar region (2) generate more induced emf in the armature (3) avoid interference of the armature flux with the main -field flux (4) reduce the demagnetizing effect of armature reaction
Last answer:
In a dc machine, interpoles are used to neutralize the effect of armature reaction in the interpolar region
dc
machine
used
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1
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asked
Apr 29, 2018
by
anonymous
Piezoelectric Transducer is used to measure
Piezoelectric Transducer is used to measure (1) displacement (2) resistance (3) current (4) temperature
Last answer:
Piezoelectric Transducer is used to measure displacement
piezoelectric
transducer
used
measure
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54
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1
answer
asked
Apr 29, 2018
by
anonymous
Series capacitive compensation in EHV transmission line is used to
Series capacitive compensation in EHV transmission line is used to
Last answer:
To maintain voltage stability
series
capacitive
compensation
ehv
transmission
line
used
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340
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2
answers
asked
Apr 26, 2018
by
anonymous
Series reactors are used to
Series reactors are used to
Last answer:
Series reactors are used to bring down the fault level within the capacity of the switchgear
series
reactors
used
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60
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1
answer
...