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Can the electric field between two positive charges be zero?
asked
Mar 14, 2018
by
anonymous
Can the electric field between two positive charges be zero?
electric
field
positive
charges
zero
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1
Answer
answered
Aug 7, 2018
by
gabriel orina
It can only if they have equal charges.
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asked
Mar 14, 2018
by
anonymous
Is electric potential zero when electric field is zero?
Is electric potential zero when electric field is zero?
Last answer:
Yes .If electric field is zero then electric potential is zero , not even one.
electric
potential
field
zero
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Mar 10, 2018
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How can a magnetic field be used to generate an electric current?
How can a magnetic field be used to generate an electric current?
Last answer:
Magnetic field can be used to generate electric current on a condition that it is on a rate of changing magnetic flux. (Faraday's law)
magnetic
field
used
generate
electric
current
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Jun 29, 2019
by
anonymous
Briefly describe the electric field of a static charge.
Briefly describe the electric field of a static charge.
briefly
describe
the
electric
field
of
a
static
charge
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61
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answers
asked
Apr 29, 2018
by
anonymous
The ability of materials to become polarized under an applied electric field is called _______
The ability of materials to become polarized under an applied electric field is called _______ A) Ferroelectricity B) Paraelectricity C) Polectricity D) None of these
Last answer:
The ability of materials to become polarized under an applied electric field is called Paraelectricity
materials
polarized
electric
field
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asked
Apr 29, 2018
by
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The electric field inside a hollow conducting sphere ________
The electric field inside a hollow conducting sphere ________ A) Depends on the diameter of the sphere B) Varies according to the direction of earth’s magnetic poles C) Is zero D) None of these
Last answer:
The electric field inside a hollow conducting sphere Is zero
electric
field
hollow
conducting
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104
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answer
asked
Mar 14, 2018
by
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What is the direction of the induced electric field?
What is the direction of the induced electric field?
Last answer:
It is in opposite direction to the one that produced it.
direction
induced
electric
field
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46
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1
answer
asked
Mar 14, 2018
by
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What is the direction of the electric field?
What is the direction of the electric field?
Last answer:
Electric field is at right angle widh flow of current (right hand rule).
direction
electric
field
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99
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1
answer
asked
Mar 19, 2018
by
anonymous
MOSFET uses the electric field of?
MOSFET uses the electric field of?
Last answer:
MOSFET uses the electric field of gate capacitance.
mosfet
uses
electric
field
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63
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1
answer
asked
Mar 18, 2018
by
anonymous
An electric motor in which both stator field and rotor rotates with same speed is called?
An electric motor in which both stator field and rotor rotates with same speed is called?
Last answer:
An electric motor in which both stator field and rotor rotates with same speed is called synchronous motor.
electric
motor
stator
field
rotor
rotates
speed
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91
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1
answer
asked
Mar 20, 2018
by
anonymous
In Hopknison demand rate or two part tariff the demand rate or fixed charges are?
Last answer:
In Hopknison demand rate or two part tariff the demand rate or fixed charges are dependent upon the maximum demand of the consumer.
hopknison
demand
rate
part
tariff
fixed
charges
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58
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1
answer
asked
Sep 5, 2018
by
anonymous
Differentiate between positive and negative feedback.
Differentiate between positive and negative feedback.
Last answer:
PARAMETER POSITIVE FEEDBACK NEGATIVE FEEDBACK Overall phase shift 0° or 360° 180° Feedback and input signal Are in phase Are out of phase Input signal ... Increases Input impedance Decreases Increases Output impedance Increases Decreases
differentiate
between
positive
negative
feedback
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101
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1
answer
asked
Apr 26, 2018
by
anonymous
ln HRC fuse the time between cut-off and final current zero is called
ln HRC fuse the time between cut-off and final current zero is called
Last answer:
ln HRC fuse the time between cut-off and final current zero is called the arcing time
hrc
fuse
time
between
cut-off
final
current
zero
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109
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1
answer
asked
Mar 19, 2018
by
anonymous
A transformer can have regulation closer to zero?
Last answer:
A transformer can have regulation closer to zero on leading power factor.
transformer
regulation
closer
zero
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86
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1
answer
asked
Sep 22, 2018
by
anonymous
Define the following terms related to tariff: (i) Connected load (ii) Unit consumed (iii) Fixed charges (iv) Electricity Tax
Define the following terms related to tariff: (i) Connected load (ii) Unit consumed (iii) Fixed charges (iv) Electricity Tax
Last answer:
(i) Connected load It is the sum of the power ratings (Watts or kW or MW) of all devices and machines existing (installed) in the premises of consumer. It is used to decide the ... a percentage of the total electricity bill which includes all amounts that go to the electricity supply agency.
tariff
connected
load
unit
consumed
fixed
charges
electricity
tax
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406
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1
answer
asked
Mar 20, 2018
by
anonymous
A consumer has to pay lesser fixed charges in?
Last answer:
A consumer has to pay lesser fixed charges in maximum demand tariff.
consumer
pay
lesser
fixed
charges
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64
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1
answer
asked
Mar 20, 2018
by
anonymous
Depreciation charges are high in case of?
Last answer:
Depreciation charges are high in case of thermal plant.
depreciation
charges
high
case
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90
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1
answer
asked
Mar 25, 2018
by
anonymous
A field of force can exist only between?
A field of force can exist only between?
Last answer:
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field
force
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98
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1
answer
asked
Apr 29, 2018
by
anonymous
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Last answer:
Which of the following has nearly zero temperature coefficient? A) Constantan B) Manganin C) Both A and B D) None of these
zero
temperature
coefficient
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55
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1
answer
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Mar 17, 2018
by
anonymous
The magnetic factor required to reduce the residual magnetization zero is called?
The magnetic factor required to reduce the residual magnetization zero is called?
magnetic
factor
reduce
residual
magnetization
zero
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64
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answers
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Sep 3, 2019
by
anonymous
advantages of negative feedback over positive feedback.
advantages of negative feedback over positive feedback.
Last answer:
Advantages of negative feedback over positive feedback: 1. Higher fidelity i.e. more linear operation. 2. Highly stabilized gain. 3. Increased bandwidth i.e. improved frequency response. 4. Less ... . 8. Input and output impedance can be modified as desired. 9. Less frequency distortion.
positive
feedback
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99
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answer
asked
Sep 5, 2018
by
anonymous
Write advantages and disadvantages of positive and negative feedback.
Write advantages and disadvantages of positive and negative feedback.
Last answer:
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advantages
disadvantages
positive
negative
feedback
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Sep 5, 2018
by
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Define negative and positive feedback
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Last answer:
1. Negative feedback: Feedback in which feedback signal is out of phase with input signal and it decreases output is called negative feedback. 2. Positive feedback: Feedback in which feedback signal is in phase with input signal and it increases output is called positive feedback.
define
negative
positive
feedback
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68
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1
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asked
Mar 14, 2018
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Is an anode positive or negative?
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Last answer:
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anode
positive
negative
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60
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1
answer
asked
Mar 14, 2018
by
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Why does charge flow from positive to negative?
Why does charge flow from positive to negative?
charge
flow
positive
negative
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60
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answers
asked
Aug 8, 2018
by
anonymous
Give the relation between magnetic field strength, magnetic flux density and permeability.
Give the relation between magnetic field strength, magnetic flux density and permeability.
magnetic
field
strength
flux
density
permeability
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63
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0
answers
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.
stray
magnetic
field
ac
bridges
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110
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1
answer
asked
Mar 18, 2018
by
anonymous
If the field of synchronous motor is under excited, power factor will be?
If the field of synchronous motor is under excited, power factor will be?
Last answer:
If the field of synchronous motor is under excited, power factor will be lagging.
field
synchronous
motor
excited
power
factor
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147
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1
answer
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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
Sep 6, 2018
by
anonymous
What arc the errors occurring in measuring devices due to stray magnetic field and temp '? Explain how to compensate them.
What arc the errors occurring in measuring devices due to stray magnetic field and temp '? Explain how to compensate them.
Last answer:
1. Error due to stray magnetic fields- Main magnetic field gets disturbed by external magnetic fields known as stray magnetic fields. 2. Compensation technique To avoid this error, ... resistance alloy having a negligible resistance temp coefficient in the ratio of 1:10 for pressure coil
errors
measuring
devices
stray
magnetic
field
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59
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1
answer
asked
Apr 29, 2018
by
anonymous
Which of the following laws relates the magnetic field to the magnitude, direction, length, and proximity
Which of the following laws relates the magnetic field to the magnitude, direction, length, and proximity of the electric current? A) Lenz’s law B) Faraday’s law C) Biot–Savart law D) None of these
Last answer:
Which of the following laws relates the magnetic field to the magnitude, direction, length, and proximity of the electric current? A) Lenz’s law B) Faraday’s law C) Biot–Savart law D) None of these
magnetic
field
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62
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1
answer
asked
Apr 28, 2018
by
anonymous
Specific energy consumption of an electric train is the ratio between
Specific energy consumption of an electric train is the ratio between (A) Specific energy output at driving wheels and efficiency of the traction motor (B) Specific energy output at driving wheels and efficiency of the transmission gear (C) Specific energy output of driving motor and efficiency of the driving wheels (D) Specific energy output at driving wheels and efficiency of the (motor + transmission gear)
Last answer:
Specific energy consumption of an electric train is the ratio between Specific energy output at driving wheels and efficiency of the (motor + transmission gear)
energy
consumption
electric
train
ratio
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76
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1
answer
asked
Jun 11, 2019
by
anonymous
Field intensity formula
Field intensity formula
Last answer:
Field intensity formula
field
intensity
formula
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42
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1
answer
asked
Jun 11, 2019
by
anonymous
Energy stored in electrostatic field of capacitance formula
Energy stored in electrostatic field of capacitance formula
Last answer:
Energy stored in electrostatic field of capacitance formula
energy
stored
in
electrostatic
field
of
capacitance
formula
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58
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1
answer
asked
Sep 5, 2018
by
anonymous
Define junction field effect transistor (JFET) and give an example.
Define junction field effect transistor (JFET) and give an example.
Last answer:
Junction Field-Effect Transistor: It is a semiconductor device having three terminals, namely Gate, Drain and Source, in which the current flow is controlled by an electric field set up by an external voltage applied ... : i) n-channel JFET and ii) p-channel JFET Examples of JFET: BFW 10, BFW 11
define
junction
field
effect
transistor
jfet
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145
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1
answer
asked
Sep 4, 2018
by
anonymous
Derive an expression for energy stored in a magnetic field .
Derive an expression for energy stored in a magnetic field .
Last answer:
Expression for energy stored in a magnetic field: The energy is stored in magnetic field when current increases and return back when the current decreases. At instant t' seconds after closer of switch ... energy absorbed by the magnetic field when current increases from 0 to I amperes
derive
expression
energy
stored
magnetic
field
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121
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1
answer
asked
Aug 8, 2018
by
anonymous
Define magnetic field strength and state its unit.
Define magnetic field strength and state its unit.
Last answer:
Magnetic field strength is the force experienced by a unit N-pole when placed at any point in a magnetic field is known as magnetic field strength or magnetizing force. Magnetising force or magnetic field ... unit of length is metre. So the unit of magnetic field strength is ampere turns per metre.
magnetic
field
strength
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77
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1
answer
asked
May 27, 2020
by
anonymous
Why does the magnetic field flow from north to south?
Why does the magnetic field flow from north to south?
magnetic
field
flow
north
south
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30
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0
answers
asked
Mar 30, 2020
by
anonymous
A magnetic circuit has effective iron length of 100 cm and it is wound with 800 turns of wire carries 1 A. Find the magnetic field strength.
A magnetic circuit has effective iron length of 100 cm and it is wound with 800 turns of wire carries 1 A. Find the magnetic field strength.
Last answer:
magnetic field strength
magnetic
field
strength
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156
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1
answer
asked
May 1, 2018
by
anonymous
In a synchronous machine, if the field flux axis ahead of the armature field axis in the direction of rotation,
In a synchronous machine, if the field flux axis ahead of the armature field axis in the direction of rotation, the machine is operating as (1) synchronous motor (2) synchronous generator (3) asynchronous motor (4) asynchronous generator
Last answer:
In a synchronous machine, if the field flux axis ahead of the armature field axis in the direction of rotation, the machine is operating as synchronous generator
synchronous
machine
field
flux
axis
armature
direction
rotation
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311
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1
answer
asked
Apr 28, 2018
by
anonymous
Which of the following statements is not characteristic of a static magnetic field?
Which of the following statements is not characteristic of a static magnetic field? (A) It is solenoidal. (B) It is conservative. (C) It has no sinks or sources. (D) Flux lines are always closed.
Last answer:
Which of the following statements is not characteristic of a static magnetic field? (A) It is solenoidal. (B) It is conservative. (C) It has no sinks or sources. (D) Flux lines are always closed.
characteristic
static
magnetic
field
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1.3k
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1
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asked
Mar 26, 2018
by
anonymous
It is possible to increase the field flux and, at the same time, increase the speed...
It is possible to increase the field flux and, at the same time, increase the speed of a d.c. motor provided its .......... is held constant.
Last answer:
It is possible to increase the field flux and, at the same time, increase the speed of a d.c. motor provided its armature current is held constant.
field
flux
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67
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1
answer
asked
Mar 21, 2018
by
anonymous
A sinusoidal voltage of 5 Hz is applied to the field of a shunt generator. The armature voltage wave?
Last answer:
A sinusoidal voltage of 5 Hz is applied to the field of a shunt generator. The armature voltage wave will be of 5 Hz.
sinusoidal
field
shunt
generator
armature
voltage
wave
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127
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1
answer
asked
Mar 21, 2018
by
anonymous
Flashing the field of D.C. generator means?
Last answer:
Flashing the field of D.C. generator means creating residual magnetism by a D.C. source.
flashing
field
generator
dc
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58
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1
answer
asked
Mar 20, 2018
by
anonymous
If the field of a D.C. shunt motor gets opened while motor is running?
Last answer:
If the field of a D.C. shunt motor gets opened while motor is running the motor will attain dangerously high speed.
field
dc
shunt
motor
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92
views
1
answer
asked
Mar 20, 2018
by
anonymous
In a shaded pole single-phase motor, the revolving field is produced by the use of?
Last answer:
In a shaded pole single-phase motor, the revolving field is produced by the use of shading coils.
shaded
pole
single-phase
motor
field
use
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85
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1
answer
asked
Mar 20, 2018
by
anonymous
If the field winding of an unloaded salient pole synchronous motor is open circuited, the motor will?
Last answer:
If the field winding of an unloaded salient pole synchronous motor is open circuited, the motor will stop.
field
winding
unloaded
salient
pole
synchronous
motor
open
circuited
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115
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1
answer
asked
Jan 9
by
anonymous
The slope of the velocity time graph for retarded motion is: (a) Positive (b) negative (c) zero (d) can be +ve, -ve or zero.
The slope of the velocity time graph for retarded motion is: (a) Positive (b) negative (c) zero (d) can be +ve, -ve or zero.
uniform
motion
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10
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0
answers
asked
May 7, 2020
by
anonymous
State advantages of rotating field type alternators.
State advantages of rotating field type alternators.
Last answer:
Advantages of Rotating Field Type Alternator: 1) For high-voltage alternator, large space is required to accommodate conductors with insulation, as high voltage is induced in them. If field poles are placed ... is kept rotating. 8) Rotating field is comparatively light and can run with high speed.
state
advantages
of
rotating
field
type
alternators
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59
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1
answer
asked
Mar 20, 2018
by
anonymous
Magnetic field in a D.C. generator is produced by?
Last answer:
Magnetic field in a D.C. generator is produced by electromagnets.
magnetic
field
dc
generator
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97
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1
answer
asked
Mar 20, 2018
by
anonymous
If a D.C. shunt motor is working at full load and if shunt field circuit suddenly opens?
Last answer:
If a D.C. shunt motor is working at full load and if shunt field circuit suddenly opens this will make armature to take heavy current, possibly burning it.
dc
shunt
motor
working
full
load
field
circuit
suddenly
opens
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99
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