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The ground wire should not be smaller than No ______ copper.
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asked
Mar 20, 2018
by
anonymous
ground
wire
smaller
copper
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1
Answer
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answered
Mar 20, 2018
by
anonymous
The ground wire should not be smaller than No
10
copper
.
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Related questions
asked
Mar 10, 2018
by
anonymous
How do magnets and copper wire make electricity?
How do magnets and copper wire make electricity?
Last answer:
According to Faradays law , a changing magnetic field on a conductor induses current in the conductor through mutual induction.
magnets
copper
wire
make
electricity
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145
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1
answer
asked
May 8, 2018
by
anonymous
A fuse wire should have :
A fuse wire should have : (A) Low specific resistance and high melting point (B) Low specific resistance and low melting point (C) High specific resistance and high melting point (D) High specific resistance and low melting point
Last answer:
A fuse wire should have : High specific resistance and low melting point
fuse
wire
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90
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1
answer
asked
Aug 18, 2019
by
anonymous
Why should switch be connected only on the live wire and never on the neutral wire?
Why should switch be connected only on the live wire and never on the neutral wire?
Last answer:
Current runs from the transformer, through the protective device, through the load and back through the protective device (if on RCD). If the protective device is only a CB the current passes ... the circuit will operate correctly but this is an unsafe practice and does not meet the standards.
live
wire
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5
answers
asked
Mar 21, 2018
by
anonymous
In order to achieve high accuracy, the slide wire of a potentiometer should be?
Last answer:
In order to achieve high accuracy, the slide wire of a potentiometer should be as long as possible.
slide
wire
potentiometer
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1
answer
asked
Mar 22, 2018
by
anonymous
On the ladder resting on the ground and leaning against a smooth vertical wall, the force of friction will be?
On the ladder resting on the ground and leaning against a smooth vertical wall, the force of friction will be?
Last answer:
On the ladder resting on the ground and leaning against a smooth vertical wall, the force of friction will be zero at its upper end.
ladder
resting
ground
leaning
smooth
vertical
force
friction
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1
answer
asked
Mar 22, 2018
by
anonymous
On a ladder resting on smooth ground and leaning against vertical wall, the force of friction will be?
On a ladder resting on smooth ground and leaning against vertical wall, the force of friction will be?
Last answer:
On a ladder resting on smooth ground and leaning against vertical wall, the force of friction will be upwards at its upper end.
ladder
resting
smooth
ground
vertical
force
friction
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1
answer
asked
Mar 20, 2018
by
anonymous
The running winding of a single phase motor on testing with meggar is found to be ground...
The running winding of a single phase motor on testing with meggar is found to be ground. Most probable location of the ground will be?
Last answer:
The running winding of a single phase motor on testing with meggar is found to be ground. Most probable location of the ground will be at the slot edge where coil enters or comes out of the slot.
running
winding
single
phase
motor
testing
meggar
ground
location
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1
answer
asked
Apr 29, 2018
by
anonymous
Aluminium is not used as winding wire for the armature of a dc machine because
Aluminium is not used as winding wire for the armature of a dc machine because (1) aluminium has low resistivity (2) a large winding space is taken by aluminium conductors and creates jointing problems (3) the thermal conductivity of aluminium is low (4) aluminium has low conductivity as compared to copper
Last answer:
Aluminium is not used as winding wire for the armature of a dc machine because (2) a large winding space is taken by aluminium conductors and creates jointing problems (3) the thermal conductivity of aluminium is low (4) aluminium has low conductivity as compared to copper
aluminium
winding
wire
armature
dc
machine
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1
answer
asked
May 2, 2020
by
anonymous
Describe the concept of virtual ground with reference to op-Amp.
Describe the concept of virtual ground with reference to op-Amp.
Last answer:
Virtual ground concept:-In circuit point A is virtual ground. Figure shows inverting amplifier using op-amp. In this circuit non-inverting terminal is connected to the actual ground. Due to ... zero potential without actually grounding is known as virtual ground concept. Circuit diagram:
describe
the
concept
of
virtual
ground
with
reference
to
op-amp
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2
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asked
Apr 29, 2018
by
anonymous
If an unsymmetrical line to ground fault occurs at the secondary terminals of a delta/star, ungrounded
If an unsymmetrical line to ground fault occurs at the secondary terminals of a delta/star, ungrounded transformer, then (A) zero sequence currents are present on both sides of the transformer (B) zero sequence currents are absent on both sides of the transformer (C) zero sequence currents are present on the secondary side but not on the primary side (D) zero sequence currents are present on the primary side but not on the secondary side
Last answer:
If an unsymmetrical line to ground fault occurs at the secondary terminals of a delta/star, ungrounded transformer, then zero sequence currents are absent on both sides of the transformer
unsymmetrical
line
ground
fault
secondary
terminals
delta
star
transformer
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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
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1
answer
asked
Sep 10, 2017
by
anonymous
why electricity goes to ground?
Last answer:
To avoid electric shock from electrical appliances to the human body
electricity
ground
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2
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asked
May 8, 2018
by
anonymous
A 40 kVA transformer has a core loss of 400 W and a full load copper loss of 800 W. The
A 40 kVA transformer has a core loss of 400 W and a full load copper loss of 800 W. The proportion of full load at maximum efficiency is
Last answer:
A 40 kVA transformer has a core loss of 400 W and a full load copper loss of 800 W. The proportion of full load at maximum efficiency is 0.707
kva
transformer
core
loss
full
load
copper
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1
answer
asked
Apr 30, 2018
by
anonymous
At full -load of a transformer, the iron loss and copper loss are 3000 W and 4000 W respectively. Then total
At full -load of a transformer, the iron loss and copper loss are 3000 W and 4000 W respectively. Then total loss at maximum efficiency is : (A) 7000 W (B) 6000 W (C) 8000 W (D) 4000 W
Last answer:
At full -load of a transformer, the iron loss and copper loss are 3000 W and 4000 W respectively. Then total loss at maximum efficiency is : 6000 W
full-load
transformer
iron
loss
copper
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1
answer
asked
Mar 25, 2018
by
anonymous
Two copper conductors have equal length. The cross-sectional area of one conductor is four times that of the other...
Two copper conductors have equal length. The cross-sectional area of one conductor is four times that of the other. If the conductor having smaller cross-sectional area has a resistance of 40 ohms the resistance of other conductor will be?
Last answer:
Two copper conductors have equal length. The cross-sectional area of one conductor is four times that of the other. If the conductor having smaller cross-sectional area has a resistance of 40 ohms the resistance of other conductor will be 10 ohms.
copper
conductors
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1
answer
asked
Dec 13, 2017
by
anonymous
explain skin effect in copper interconnects. what are the various ways of reducing this effect?
explain skin effect in copper interconnects. what are the various ways of reducing this effect?
Last answer:
Skin effect generally observed in ac conductor in transmission network, in skin the current flowing through outer layer of conductor is more than iner area of conductor thus we can say the ... for reducing this effect we can use boundel conductor or used hollow conductor for power transmission
copper
interconnects
skin
effect
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1
answer
asked
May 7, 2020
by
anonymous
State Magneto-striction. Draw Hysteresis loop for : (i) High silicon steel (ii) Copper (iii) Soft iron (iv) Wood
State Magneto-striction. Draw Hysteresis loop for : (i) High silicon steel (ii) Copper (iii) Soft iron (iv) Wood
Last answer:
Magneto-striction: It is the change in dimensions of ferro magnetic material when it is magnetized for eg. Silicon steel, iron or any ferromagnetic material. i) Hysteresis loop for High silicon steel : ... loop for Soft iron : iv) Hysteresis loop for Copper and Wood :
state
magneto-striction
draw
hysteresis
loop
for
i
high
silicon
steel
ii
copper
iii
soft
iron
iv
wood
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107
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1
answer
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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68
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1
answer
asked
Aug 18, 2019
by
anonymous
Why is aluminium used instead of copper for overhead cables?
Why is aluminium used instead of copper for overhead cables?
Last answer:
Because copper reacts with atmosphere variation and it's cost High as compared to aluminium and aluminium is good property and less cost so aluminium is used
aluminium
copper
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115
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6
answers
asked
Jul 1, 2019
by
anonymous
Which is a semiconductor: copper, silicon, or neon?
Which is a semiconductor: copper, silicon, or neon?
Last answer:
Copper is a metal. Silicon is a semiconductor. Neon is inert gas.
which
is
a
semiconductor
copper
silicon
or
neon
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1
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asked
Sep 4, 2018
by
anonymous
Compare copper and aluminium.
Compare copper and aluminium.
Last answer:
Copper Aluminium Resistivity is less Resistivity is more More weight Low weight Mechanically strong Mechanically weaker Specific Gravity high Specific Gravity Low ... Tensile strength is half of that of copper Used for winding Used for overhead lines
compare
copper
aluminium
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36
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1
answer
asked
Mar 25, 2018
by
anonymous
Current velocity through a copper conductor is?
Current velocity through a copper conductor is
current
velocity
copper
conductor
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100
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0
answers
asked
Mar 20, 2018
by
anonymous
Copper brushes in D.C. machine are used?
Last answer:
Copper brushes in D.C. machine are used where low voltage and high currents are involved.
copper
brushes
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1
answer
asked
Mar 19, 2018
by
anonymous
Auto-transformer makes effective saving on copper and copper losses, when its transformation ratio is?
Auto-transformer makes effective saving on copper and copper losses, when its transformation ratio is?
Last answer:
Auto-transformer makes effective saving on copper and copper losses, when its transformation ratio is approximately equal to 1.
auto-transformer
effective
saving
copper
losses
transformation
ratio
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1
answer
asked
May 8, 2018
by
anonymous
The function of steel wire in ACSR conductors is
The function of steel wire in ACSR conductors is (A) To take care of surges. (B) To reduce corona. (C) To reduce inductance. (D) To provide additional mechanical strength
Last answer:
The function of steel wire in ACSR conductors is To provide additional mechanical strength
function
steel
wire
acsr
conductors
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1
answer
asked
May 8, 2018
by
anonymous
Increasing the number of turns of wire on the secondary of a transformer will
Increasing the number of turns of wire on the secondary of a transformer will (A) Decrease the secondary current (B) Increase the primary current (C) Have no effect on the secondary current (D) Increase the secondary current
Last answer:
Increasing the number of turns of wire on the secondary of a transformer will Decrease the secondary current
increasing
number
turns
wire
secondary
transformer
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537
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1
answer
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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107
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1
answer
asked
Apr 26, 2018
by
anonymous
lf the wire which is vertical to this page has electron flow downwards the conductor will have
lf the wire which is vertical to this page has electron flow downwards the conductor will have
Last answer:
lf the wire which is vertical to this page has electron flow downwards the conductor will have a counter-clockwise field in the plane of the paper
wire
vertical
page
electron
flow
downwards
conductor
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142
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1
answer
asked
Mar 25, 2018
by
anonymous
The resistance of a few meters of wire conductor in closed electrical circuit is?
The resistance of a few meters of wire conductor in closed electrical circuit is?
Last answer:
The resistance of a few meters of wire conductor in closed electrical circuit is practically zero.
resistance
meters
wire
conductor
electrical
circuit
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135
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1
answer
asked
Mar 22, 2018
by
anonymous
A trolley wire weighs 1.2 kg per meter length. The ends of the wire are attached to two poles 20 meters apart...
A trolley wire weighs 1.2 kg per meter length. The ends of the wire are attached to two poles 20 meters apart. If the horizontal tension is 1500 kg find the dip in the middle of the span?
Last answer:
A trolley wire weighs 1.2 kg per meter length. The ends of the wire are attached to two poles 20 meters apart. If the horizontal tension is 1500 kg find the dip in the middle of the span 4.0 cm.
trolley
wire
weighs
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3.2k
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1
answer
asked
Aug 21, 2019
by
anonymous
What happens when a neutral wire touches a phase wire ?
What happens when a neutral wire touches a phase wire ?
Last answer:
Maximum current flow due to Short circuit, limited value of fuse will burn else apparatus and conductor will be damaged.
neutral
wire
touches
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85
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2
answers
asked
Aug 18, 2019
by
anonymous
Which wire can carry a higher current stranded wire or solid wire?
Which wire can carry a higher current stranded wire or solid wire?
Last answer:
From the formula R=PL/A resistance rise with the fall of surface area ,inverse proportion relation between Resistance and Area ,so stranded wire has more area that a solid wire so more area less resistance. Less resistance/less electron flow opposition,more electron flow (current)
stranded
solid
wire
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287
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5
answers
asked
Sep 20, 2018
by
anonymous
State functions of ; i) Cable box ii) Guard wire iii) Shackle insulator iv) Stay wire used in service connection
State functions of ; i) Cable box ii) Guard wire iii) Shackle insulator iv) Stay wire used in service connection
Last answer:
i) Function of Cable box: To hold and inspect incoming and outgoing terminals ii) Function of Guard wire : A grounded conductor placed beneath an overhead transmission line in order to ground ... in service connection: To give mechanical Support to pole, line and prevent leakage current if any
cable
box
guard
wire
shackle
insulator
stay
used
service
connection
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87
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1
answer
asked
Mar 25, 2018
by
anonymous
Nichrome wire is an alloy of?
Nichrome wire is an alloy of?
Last answer:
Nichrome wire is an alloy of nickel and chromium.
nichrome
wire
alloy
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52
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1
answer
asked
Mar 25, 2018
by
anonymous
If a wire conductor of 0.2 ohm resistance is doubled in length, its resistance becomes?
If a wire conductor of 0.2 ohm resistance is doubled in length, its resistance becomes?
Last answer:
If a wire conductor of 0.2 ohm resistance is doubled in length, its resistance becomes 0.4 ohm.
wire
conductor
ohm
resistance
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164
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1
answer
asked
Mar 25, 2018
by
anonymous
Wire-wound resistors are unsuitable for use at high frequencies because they?
Wire-wound resistors are unsuitable for use at high frequencies because they?
Last answer:
Wire-wound resistors are unsuitable for use at high frequencies because they exhibit unwanted inductive and capacitive effects.
wire
wound
resistors
high
frequencies
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111
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1
answer
asked
Mar 14, 2018
by
anonymous
What happens when a current flows through a wire?
What happens when a current flows through a wire?
Last answer:
Current can produce two effect one is heating effect and second is magnetic effect.
current
flows
through
wire
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88
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2
answers
asked
Mar 10, 2018
by
anonymous
What is ACCC wire?
What is ACCC wire?
Last answer:
Aluminum Conductor Composite Core
accc
wire
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86
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1
answer
asked
Mar 10, 2018
by
anonymous
How is electricity passed through a wire?
How is electricity passed through a wire?
Last answer:
A wire contains mobile electrons as majority charge carriers and holes as minority charge carriers when an emf or potential diffrence is provided , electrons flow in opposite direction with holes(convection current flow)
electricity
passed
wire
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114
views
3
answers
asked
Dec 22, 2017
by
anonymous
Which color wire is neutral?
Which color wire is neutral?
Last answer:
Black but I think it depends with the place.
color
wire
neutral
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6
like
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2
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201
views
3
answers
asked
Jun 17, 2018
by
anonymous
The burden value in Potential Transformer (PT) should be ______ to achieve low errors in PT:
The burden value in Potential Transformer (PT) should be ______ to achieve low errors in PT: A) low B) high C) medium D) infinite
Last answer:
The burden value in Potential Transformer (PT) should be high to achieve low errors in PT:
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73
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1
answer
asked
Apr 30, 2018
by
anonymous
For selecting a circuit breaker, ______ should be determined.
For selecting a circuit breaker, ______ should be determined. (A) initial current that flows on occurrence of a short circuit only (B) transient current that flows at the time of circuit interruption only (C) resonant frequency only (D) (A) and (B)
Last answer:
For selecting a circuit breaker, ______ should be determined. (A) initial current that flows on occurrence of a short circuit only (B) transient current that flows at the time of circuit interruption only (C) resonant frequency only (D) (A) and (B)
circuit
breaker
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55
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1
answer
asked
2 days
ago
by
anonymous
A person can jump higher on the moon’s surface than on the earth because : (1) the moon’s surface is rough (2) the acceleration due to gravity in moon is smaller than that on the earth. (3) the moon is cooler than earth (4) the moon has no atmosphere
A person can jump higher on the moon’s surface than on the earth because : (1) the moon’s surface is rough (2) the acceleration due to gravity in moon is smaller than that on the earth. (3) the moon is cooler than earth (4) the moon has no atmosphere
Last answer:
the acceleration due to gravity in moon is smaller than that on the earth.
physics
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1
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asked
Mar 20, 2018
by
anonymous
Which motor should not be started on no-load ?
Last answer:
Series motor should not be started on no-load.
motor
started
no-load
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68
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1
answer
asked
Mar 15, 2018
by
anonymous
Why dc series motor should not be started at no load?
Why dc series motor should not be started at no load?
dc
series
motor
started
load
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597
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0
answers
asked
4 days
ago
by
anonymous
An oil drop spreads over water because (1) oil is lighter than water (2) oil is more viscous (3) oil does not mix with water (4) surface tension of oil is much smaller than that of water
An oil drop spreads over water because (1) oil is lighter than water (2) oil is more viscous (3) oil does not mix with water (4) surface tension of oil is much smaller than that of water
Last answer:
surface tension of oil is much smaller than that of water
physics
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1
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asked
2 days
ago
by
anonymous
Copper wires are generally used for electrical power transmission instead of iron wire because : (1) copper is cheaper than iron (2) copper is lighter than iron (3) copper is a better conductor of electricity than iron (4) copper can take higher power than iron
Copper wires are generally used for electrical power transmission instead of iron wire because : (1) copper is cheaper than iron (2) copper is lighter than iron (3) copper is a better conductor of electricity than iron (4) copper can take higher power than iron
Last answer:
copper is a better conductor of electricity than iron
physics
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2 days
ago
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anonymous
A copper disc has a hole. If the disc is heated, the size of the hole (1) increases (2) decreases (3) No change (4) first increases and than decreases
A copper disc has a hole. If the disc is heated, the size of the hole (1) increases (2) decreases (3) No change (4) first increases and than decreases
Last answer:
increases
physics
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3 days
ago
by
anonymous
Two stones of different masses are dropped simultaneously from the top of a building (1) Smaller stone reaches the ground earlier (2) Larger stone reaches the ground earlier (3) Both the stones reach the ground at the same time (4) Depends on the composition of the stone
Two stones of different masses are dropped simultaneously from the top of a building (1) Smaller stone reaches the ground earlier (2) Larger stone reaches the ground earlier (3) Both the stones reach the ground at the same time (4) Depends on the composition of the stone
Last answer:
Both the stones reach the ground at the same time
physics
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asked
Apr 9, 2018
by
anonymous
A coherent QPSK demodulator is required on ground for receiving data from a LEO satellite. What should be...
A coherent QPSK demodulator is required on ground for receiving data from a LEO satellite. What should be optimum order of PLL in the carrier phase tracking loop? A) 1st order B) 2nd order C) 3rd order D) None of the above
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