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Explain the significance of over modulation.
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Mar 10, 2018
by
anonymous
Explain the significance of over modulation.
significance
over
modulation
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asked
Aug 4, 2019
by
anonymous
i) State the significance of modulation index in AM transmission. ii) Explain the effect of modulation index on AM wave with waveforms.
i) State the significance of modulation index in AM transmission. ii) Explain the effect of modulation index on AM wave with waveforms.
Last answer:
Significance of modulation index in AM transmission It is used to determine the strength and quality of transmitted signal. If the modulation index is small, then the amount of variation in ... amplitude part of its information is lost in the process of modulation which is undesirable.
modulation
index
am
transmission
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asked
Mar 10, 2018
by
anonymous
Explain the pulse width modulation technique for control of AC output voltage.
Explain the pulse width modulation technique for control of AC output voltage.
pulse
width
modulation
technique
control
ac
output
voltage
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Sep 6, 2018
by
anonymous
Explain significance and purpose of electrical measurement system.
Explain significance and purpose of electrical measurement system.
Last answer:
➢ Significance of Electrical Measurement System 1. The measurement is required for measurement of all physical quantities for e.g speed, velocity, temperature, pressure etc. 2. All electrical ... 4. These standards and references may changes time to time, area to area person to person
significance
electrical
measurement
system
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asked
Aug 2, 2019
by
anonymous
Define measurement and state the significance of electrical measurement system.
Define measurement and state the significance of electrical measurement system.
Last answer:
Measurement: Measurement is essentially a process in which magnitude of a quantity is determined in comparison with another similar quantity with significant units. OR The measurement of a given ... x) The measurement conforms the validity of hypothesis and also adds to its understanding.
measurement
significance
electrical
system
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asked
Sep 6, 2018
by
anonymous
State the significance of term measurement.
State the significance of term measurement.
Last answer:
Measurement is the quantitative comparison between unknown quantities with known standard. For doing this process there is need of physical device, called as measuring instrument. The measurement confirms the validity of the hypothesis and also adds to its understanding.
significance
measurement
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asked
Sep 6, 2018
by
anonymous
State the significance of power factor.
State the significance of power factor.
Last answer:
Significance of power factor:- 1. Cosine of angle between voltage & current in a circuit is called power factor. 2. It is a measure of the real power in a circuit. 3. Inductive & ... KVA rating equipment 5. Greater conductor size 6. CosØ = R/Z CosØ= Active Power/ Apparent Power
significance
power
factor
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asked
Oct 19, 2017
by
anonymous
what are the significance of kernel in RTOS ?
what are the significance of kernel in RTOS ?
Last answer:
In every RTOS there is the kernel. The kernel is the core supervisory software. The kernel provides minimal logic. Scheduling is also provided by the kernel. The resource- ... device managment service.RTOS kernel has interrupt management service.RTOS kernel has memory management service.
significance
kernel
rtos
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asked
May 8, 2018
by
anonymous
Thyristor can be protected from over voltages by using
Thyristor can be protected from over voltages by using
Last answer:
Thyristor can be protected from over voltages by using Voltage clamping device
thyristor
protected
over
voltages
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81
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asked
Aug 3, 2019
by
anonymous
State the need of modulation in communication system.
State the need of modulation in communication system.
Last answer:
Need of modulation:- 1. To reduce the height of antenna 2. To avoids mixing of signals 3. To increases the range of communication 4. To make multiplexing of maximum signal is possible 5. To improve the quality of reception
modulation
communication
system
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asked
Jun 18, 2018
by
anonymous
The total power of an AM transmitter having a carrier power of 50 W and the percentage of modulation at
The total power of an AM transmitter having a carrier power of 50 W and the percentage of modulation at 80% is A) 50 W B) 66 W C) 68 W D) 70 W
Last answer:
The total power of an AM transmitter having a carrier power of 50 W and the percentage of modulation at 80% is 66 W
total
power
am
transmitter
carrier
percentage
modulation
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asked
Mar 19, 2018
by
anonymous
What is channel length modulation in MOSFET?
What is channel length modulation in MOSFET?
Last answer:
Shortening of lenght of the inverted channel region with increase in drain bias for large drain biases due to which current increases with drain bias and output resistance decreases is called channel length modulation in MOSFET.
channel
length
modulation
mosfet
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2
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asked
May 7, 2020
by
anonymous
State any two advantages of MCB over Fuse. State the standard specifications of MCB available in the market.
State any two advantages of MCB over Fuse. State the standard specifications of MCB available in the market.
Last answer:
Following advantages of MCB over Fuse: 1. No need of replacement of fuse wire. 2. Manually restore of supply is simple. 3. Fault understanding by visual inspection 4. More safe than fuse The standard specifications of ... 6A, 10A,16A,20A, 25A, 30A, 32A, 40A, 50A, 60A and 63A 6. 250V and 450 v
state
any
two
advantages
of
mcb
over
fuse
the
standard
specifications
available
in
market
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asked
Apr 26, 2020
by
anonymous
What is the advantage of AC over DC electrical transmission?
What is the advantage of AC over DC electrical transmission?
advantage
ac
over
dc
electrical
transmission
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asked
May 8, 2018
by
anonymous
The main advantage of AC over DC is:
The main advantage of AC over DC is: (A) Conversion flexibility from one voltage level to other (B) AC can be easily converted into DC by using a rectifier (C) AC is easy to maintain & can be easily distributed at long distances (D) All of the above
Last answer:
Ac is easy to maintain and ac can be easily converted to dc by rectifier .There is no commutator for conversion in ac that's why ac machines are weight less and more efficiency.ac machines occupy less space than dc .
main
advantage
ac
over
dc
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2
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asked
May 8, 2018
by
anonymous
Which of the following is the least expensive protection for over current in low voltage system?
Which of the following is the least expensive protection for over current in low voltage system? (A) Rewireable fuse (B) Isolator (C) Oil Circuit breaker (D) Air break circuit breaker
Last answer:
Which of the following is the least expensive protection for over current in low voltage system? (A) Rewireable fuse (B) Isolator (C) Oil Circuit breaker (D) Air break circuit breaker
over
current
low
voltage
system
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1
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asked
Mar 20, 2018
by
anonymous
The inverse definite mean time relays are used for over current and earth fault protection of transformer against?
Last answer:
The inverse definite mean time relays are used for over current and earth fault protection of transformer against internal short-circuits.
inverse
definite
mean
time
relays
used
over
current
earth
fault
protection
transformer
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asked
May 7, 2020
by
anonymous
Select insulating materials for following parts : (i) Insulation between heating element and base plate of electric iron. (ii) Insulation used over copper or aluminium conductor used for making coils. (iii) Transformer bushings. (iv) Insulation between transmission line and pole.
Select insulating materials for following parts : (i) Insulation between heating element and base plate of electric iron. (ii) Insulation used over copper or aluminium conductor used for making coils. (iii) Transformer bushings. (iv) Insulation between transmission line and pole.
Last answer:
Parts Insulating Materials Insulation between heating element and base plate of electric iron. Mica Insulation used over copper or aluminium conductor used for making coils. ... Transformer bushings Porcelain Insulation between transmission line and pole. Porcelain
heating
element
and
base
plate
of
electric
iron
ii
used
over
copper
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1
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asked
May 7, 2020
by
anonymous
State advantages of short pitch winding over full pitch winding in alternators.
State advantages of short pitch winding over full pitch winding in alternators.
Last answer:
Advantages of Short Pitch Winding over Full Pitch Winding in Alternators: 1) Short pitching reduces the amount of copper needed for end connection when compared with full pitched coil. 2) They ... reduced, thereby increasing the efficiency. 4) The power quality of generated emf is improved.
state
advantages
of
short
pitch
winding
over
full
in
alternators
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1
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asked
Jul 31, 2019
by
anonymous
State two advantages of digital system over analog system.
State two advantages of digital system over analog system.
Last answer:
1. They are less susceptible to noise. 2. The effect of fluctuation in the characteristic of the components, ageing of components etc. is very small in digital circuits. 3. Digital circuits have capability of memory which makes them suitable for computers. 4. More accurate.
advantages
digital
system
over
analog
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1
answer
asked
May 1, 2018
by
anonymous
The surge impedance for over head line is taken as
The surge impedance for over head line is taken as (1) 10-20 ohms (2) 50-60 ohms (3) 100-200 ohms (4) 1000-2000 ohms
Last answer:
The surge impedance for over head line is taken as 100-200 ohms
surge
impedance
over
head
line
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70
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1
answer
asked
Apr 28, 2018
by
anonymous
In the induction type directional over current relay, when a short-circuit occurs in the circuit
In the induction type directional over current relay, when a short-circuit occurs in the circuit (A) power flows in reverse direction (B) power flows in normal direction (C) directional power element does not operate (D) over current element is not energized
Last answer:
In the induction type directional over current relay, when a short-circuit occurs in the circuit power flows in reverse direction
induction
type
directional
over
current
relay
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76
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1
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asked
May 2, 2020
by
anonymous
What do you mean by active filter? State its advantages over passive filter . Define pass band & stop band with respect to filter.
What do you mean by active filter? State its advantages over passive filter . Define pass band & stop band with respect to filter.
Last answer:
Active Filter: Active Filter is formed by using active element along with the passive components. Advantages of Active filter over Passive filter: High value of pass band gain can be obtained. It is ... pass band. Stop Band Filter: The frequency range which is attenuated is known as stop band.
active
filter
state
its
advantages
over
passive
define
pass
band
&
stop
with
respect
to
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1
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asked
Mar 21, 2018
by
anonymous
In over compounded generator, full load terminal voltage is?
Last answer:
In over compounded generator, full load terminal voltage is more than no load terminal voltage.
over
compounded
generator
full
load
terminal
voltage
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60
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1
answer
asked
Mar 20, 2018
by
anonymous
An over excited synchronous motor on noload is known as?
Last answer:
An over excited synchronous motor on noload is known as synchronous condenser.
over
excited
synchronous
motor
noload
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55
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1
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asked
Mar 20, 2018
by
anonymous
Over voltage protection is recommended for?
Last answer:
Over voltage protection is recommended for hydro-electric generators, steam turbine generators, gas turbine generators.
over
voltage
protection
recommended
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1
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asked
Mar 10, 2018
by
anonymous
What is meant by flash over voltage?
What is meant by flash over voltage?
flash
over
voltage
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0
answers
asked
Jul 25, 2019
by
anonymous
Explain in detail over-voltage protection.
Explain in detail over-voltage protection.
Last answer:
Over-voltage protection: Over-voltage protection to the thyristor is provided using: i) R-C Snubber circuit ii) Non-linear resistor Thyrector A) Snubber Circuit: It is basically a ... returns to its high resistance state. Thyrector is normally placed across the supply terminals.
over-voltage
protection
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1
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asked
May 12, 2018
by
anonymous
In amplitude modulation scheme, the over-modulation
In amplitude modulation scheme, the over-modulation (A) is desired phenomenon (B) helps in signal recovery (C) is undesired phenomenon (D) Envelope of AM maintains the shape of the baseband signal
Last answer:
In amplitude modulation scheme, the over-modulation is desired phenomenon
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1
answer
asked
Apr 9, 2018
by
anonymous
Which modulation scheme would you suggest for high speed data transmission over a fading channel?
Which modulation scheme would you suggest for high speed data transmission over a fading channel? A) MSK B) BPSK C) FSK D) OFDM
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0
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asked
Jan 21, 2018
by
Shreya10
What causes over modulation in am
Last answer:
Excessive high voice signal may cause overmodulation. Modulating component greater than carrier may cause overmodulation. Setting the gain of the microphone too high may cause overmodulation.
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57
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1
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asked
May 13, 2018
by
anonymous
In single pulse modulation of PWM inverters, third harmonic can be eliminated if pulse width is
In single pulse modulation of PWM inverters, third harmonic can be eliminated if pulse width is equal to (a) 30o (b) 60o (c) 120o (d) 150o
Last answer:
In single pulse modulation of PWM inverters, third harmonic can be eliminated if pulse width is equal to 120o
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130
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1
answer
asked
Jan 7
by
anonymous
Explain the significance of proximate analysis.
Explain the significance of proximate analysis.
Last answer:
Significance: Proximate analysis provides following valuable information in assessing the quality of fuel i) Moisture: - Lesser the moisture better is the quality of coal. ii) Volatile Matter: - Lower / ... iv) Fixed Carbon: - Higher the percentage of fixed carbon, greater is the calorific value.
applied
chemistry
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6
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1
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asked
Dec 1, 2020
by
anonymous
Explain the significance of batching, compaction and curing of concrete.
Explain the significance of batching, compaction and curing of concrete.
Last answer:
Significance of Batching: 1. If the batching of materials required for concrete is not done appropriately, then random quantity of materials produce non-homogeneous concrete, which further leads to various ... . 3. Curing is necessary to make the concrete impermeable in nature its hardened state.
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24
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1
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asked
Nov 30, 2020
by
anonymous
Explain the significance of water reducing admixture in concrete with respect to properties of concrete.
Explain the significance of water reducing admixture in concrete with respect to properties of concrete.
Last answer:
Significance of water reducing admixture in concrete: Water reducing admixtures are essential for several purposes. The effect of using such admixtures on concrete properties is described below. 1. Water ... strength. 7. The durability of concrete structures can be ensured by using these admixtures.
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14
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1
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asked
Jun 28, 2020
by
anonymous
Explain the significance of the Laplace transform in control system.
Explain the significance of the Laplace transform in control system.
Last answer:
Significance of Laplace Transform- * Laplace transform convert higher order integral differential equation into simple algebraic form. * Laplace transform converts the differential equation into an algebraic ... equations. * Laplace transform convert time domain to frequency domain (s-plane).
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1
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asked
May 8, 2020
by
anonymous
State significance of earthing. Draw and explain pipe earthing. State the values of earth resistances for : (i) Substation (ii) Residential wiring (iii) H.T. Line (iv) L.T. Line
State significance of earthing. Draw and explain pipe earthing. State the values of earth resistances for : (i) Substation (ii) Residential wiring (iii) H.T. Line (iv) L.T. Line
Last answer:
Significance of earthing: * Earthing means connecting the body of the electrical equipment (it means the part which does not carries current under normal condition) to the earth. For example electrical equipment' ... surrounded by charcoal and salt. the values of earth resistances for:
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123
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1
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asked
Aug 9, 2019
by
anonymous
What is the significance of signal conditioner? Explain the need of following in mechatronics system. i) Isolator ii) Filter iii) Amplifier iv) Data converter
What is the significance of signal conditioner? Explain the need of following in mechatronics system. i) Isolator ii) Filter iii) Amplifier iv) Data converter
Last answer:
Significance: Signal conditioning means manipulating an analog signal in such a way that it meets the requirements of the next stage for further processing. Signal inputs accepted by signal ... -frequency converters, current-to-voltage converters, current loop converters, and charge converters.
signal
conditioner
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1
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asked
Aug 5, 2019
by
anonymous
Explain the concept of anti-Ferro magnetism and state its significance.
Explain the concept of anti-Ferro magnetism and state its significance.
Last answer:
When the neighboring magnetic moments are aligned anti-parallel. This phenomenon is called anti ferromagnetism. This phenomenon occurs below a certain temperature known as Neel temp (TN) Eg.: Cobalt oxide, Nickel oxide, Chromium.
anti-ferro
magnetism
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1
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asked
Sep 15, 2018
by
anonymous
State what is the significance of conducting phasing out test on a 3-phase transformer? Explain its procedure with a suitable connection diagram.
State what is the significance of conducting phasing out test on a 3-phase transformer? Explain its procedure with a suitable connection diagram.
Last answer:
-Short primary & secondary winding of other phases expect the one under test. -Connect voltmeter to secondary winding. -A small DC current is circulated through the primary winding through ... . -The test repeated for finding out remaining concerned secondary windings in the same manner.
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2
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asked
Jul 3, 2020
by
anonymous
State law of machine and explain its significance.
State law of machine and explain its significance.
Last answer:
Law of machine: The relation between the load lifted (W) and the effort applied (P) is known as the law of machine. This relationship, when plotted on a graph results in a straight line as shown ... the help of law of machine one can find effort required to lift any given load and vice versa.
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546
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1
answer
asked
Dec 3, 2020
by
anonymous
Explain Reynold’s number with its equation and give significance.
Explain Reynold’s number with its equation and give significance.
Last answer:
The Reynolds number is defined as the ratio of inertia force to viscous force. Reynolds number is dimensionless number. It is used to determine the laminar or turbulent flow type. Significance : Using value of Reynold's number the type of flow can be identified.
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asked
Sep 18, 2018
by
anonymous
What is back emf in DC motor? Explain its significance.
Last answer:
Back emf: When the armature of DC motor rotates under the fixed magnetic field and cuts it, by Faraday's law an emf is induced in them. The induced emf acts in opposite direction to the ... the flow of armature current i.e. it automatically changes the armature current to meet load requirements.
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asked
Apr 29, 2018
by
anonymous
An additional condition for parallel operation of three-phase transformers over single-phase transformers is that
An additional condition for parallel operation of three-phase transformers over single-phase transformers is that
Last answer:
An additional condition for parallel operation of three-phase transformers over single-phase transformers is that the transformers should belong to the same vector group
parallel
operation
three-phase
transformers
single-phase
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82
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asked
Oct 13, 2019
by
anonymous
How GTO is advantages over SCR
How GTO is advantages over SCR
Last answer:
i) It is turned-off by negative gate pulse. ii) No commutation circuit required, reducing the cost, size, weight and volume of the circuit. iii) As commutation choke is not used, the associated acoustic ... turn off time permits high switching frequency. v) It has higher di/dt rating at turn-off.
gto
advantages
scr
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495
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asked
May 13, 2018
by
anonymous
A FET is preferred over an ordinary transistor because it
A FET is preferred over an ordinary transistor because it 1. Permits high degree of isolation between input & output circuits 2. Has low noise level 3. Has very high power gain 4. Has all the above properties
Last answer:
A FET is preferred over an ordinary transistor because it Has all the above properties
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Mar 11, 2018
by
anonymous
Why is pulse train gating preferred over pulse gating ?
Why is pulse train gating preferred over pulse gating? Explain with relevant circuit and waveforms, the pulse train gating of SCRs.
pulse
train
gating
scr
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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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asked
10 hours
ago
by
anonymous
Explain with the help of block diagram, spread spectrum modulation system.
Explain with the help of block diagram, spread spectrum modulation system.
Last answer:
SPREAD-SPECTRUM COMUNICATION SYSTEM Baseband DS spread spectrum communication system model (a)transmitter (b) channel (c)receiver Explanation:- In actual DSSS system, the ... PN sequence pattern which the receiver will recognize in the presence of interference with high probability.
digital-communication-systems
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Jun 9, 2020
by
anonymous
Explain with neat sketch working of direct drive SWT. Give any two advantages of it over geared type SWT.
Explain with neat sketch working of direct drive SWT. Give any two advantages of it over geared type SWT.
Last answer:
Direct Drive SWT: This plant has no gear box. Turbine blades are very light weight made up of stiff carbon fibre material. Blades are flat shaped. Due to this shape, lift increases. ... needed is less 4. More reliable 5. Better performance 6. Light weight 7. Less maintenance
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Jul 21, 2019
by
anonymous
Explain over-current protection of transformer.
Explain over-current protection of transformer.
Last answer:
Over-Current Protection of Transformer: Simple over-current & earth fault protection of transformer against external shortcircuit and excessive overloads is shown in the above figure. The ... trip command to the circuit breaker and the transformer is disconnected from load or fault.
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...