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How can a magnetic field be used to generate an electric current?
asked
Mar 10, 2018
by
anonymous
How can a magnetic field be used to generate an electric current?
magnetic
field
used
generate
electric
current
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1
Answer
answered
Aug 15, 2018
by
gabriel orina
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)
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Related questions
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
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
Mar 14, 2018
by
anonymous
Can the electric field between two positive charges be zero?
Can the electric field between two positive charges be zero?
Last answer:
It can only if they have equal charges.
electric
field
positive
charges
zero
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54
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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
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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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
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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1
answer
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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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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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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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
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
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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1
answer
asked
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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0
answers
asked
Apr 29, 2018
by
anonymous
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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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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1
answer
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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67
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1
answer
asked
Mar 14, 2018
by
anonymous
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
anonymous
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
Aug 8, 2018
by
anonymous
Compare electric and magnetic circuit.
Compare electric and magnetic circuit.
Last answer:
.embed-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; } .embed-container iframe, .embed-container object, .embed-container embed { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }
compare
electric
magnetic
circuit
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6
answers
asked
Mar 10, 2018
by
anonymous
How do we use nuclear energy to generate electricity?
How do we use nuclear energy to generate electricity?
Last answer:
nuclear energy is produce by nuclei of atom
use
nuclear
energy
generate
electricity
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143
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2
answers
asked
Feb 16, 2018
by
anonymous
Explain hysteresis loss, eddy current loss and skin effect limitations with reference to magnetic material.
Explain hysteresis loss, eddy current loss and skin effect limitations with reference to magnetic material.
Last answer:
Hysteresis loss: Hysteresis loss is a loss which occurs due to the friction of magnetic domain due to the change in magnetic field in ferromagnetic material like iron. Hysteresis loss causes power loss ... loss in transformer is given by, We=Kef2Kf2Bm2watts Skin effect limitations:
explain
hysteresis
loss
eddy
current
skin
effect
limitations
magnetic
material
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1
answer
asked
Sep 6, 2018
by
anonymous
List out any four effects of electric current used in measuring instruments & write name of meter working on it.
List out any four effects of electric current used in measuring instruments & write name of meter working on it.
Last answer:
Effects of Electric Current used in measuring instruments: 1. Magnetic Effect: PMMC and Moving Iron type Ammeters, voltmeter and Dynamometer type wattmeters etc. 2. Electromagnetic induction ... . Electrostatic effect: Voltmeters. 5. Hall Effect: Flux meter, Poynting vector wattmeter.
electric
current
measuring
instruments
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366
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1
answer
asked
Mar 25, 2018
by
anonymous
An instrument which detects electric current is known as?
An instrument which detects electric current is known as?
Last answer:
An instrument which detects electric current is known as galvanometer.
instrument
detects
electric
current
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92
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1
answer
asked
Mar 14, 2018
by
anonymous
What is the direction of flow of electric current in an electric circuit?
What is the direction of flow of electric current in an electric circuit?
Last answer:
It flows from anode to cathode (direction of holes flow)
direction
flow
electric
current
circuit
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144
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1
answer
asked
Mar 25, 2018
by
anonymous
When electric current passes through a metallic conductor, its temperature rises. This is due to?
When electric current passes through a metallic conductor, its temperature rises. This is due to?
Last answer:
When electric current passes through a metallic conductor, its temperature rises. This is due to collisions between conduction electrons and atoms.
electric
current
metallic
conductor
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79
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1
answer
asked
Mar 25, 2018
by
anonymous
Heat in a conductor is produced on the passage of electric current due to?
Heat in a conductor is produced on the passage of electric current due to?
Last answer:
Heat in a conductor is produced due to frictional collision of electrons flow as they conduct current.
heat
conductor
electric
current
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184
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1
answer
asked
May 7, 2020
by
anonymous
State the material used for making (1) Magnetic Core (2) Fuse element
State the material used for making (1) Magnetic Core (2) Fuse element
Last answer:
The material used for making of: (1) Magnetic Core : Iron, cobalt, Nickel, CRGO, HRGO , silicon steel (2) Fuse Element: Tin- lead wire, Tinned copper wire
state
the
material
used
for
making
1
magnetic
core
2
fuse
element
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51
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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
Mar 25, 2018
by
anonymous
When electric current passes through a bucket full of water, lot of bubbling is observed...
When electric current passes through a bucket full of water, lot of bubbling is observed. This suggests that the type of supply is?
Last answer:
When electric current passes through a bucket full of water, lot of bubbling is observed. This suggests that the type of supply is D.C.
electric
current
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126
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1
answer
asked
Apr 26, 2018
by
anonymous
Eddy current damping cannot be used for moving iron instrument because
Eddy current damping cannot be used for moving iron instrument because
Last answer:
Eddy current damping cannot be used for moving iron instrument because the presence of a permanent magnet required for such purpose would affect the deflection and hence the reading of the instrument
eddy
current
damping
used
moving
iron
instrument
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2.0k
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1
answer
asked
Mar 10, 2018
by
anonymous
What do we use to generate electricity?
What do we use to generate electricity?
Last answer:
Use wind turbines. In a windy seashore we set up some wind turbines. But when the place is not windy we got no electricity.
use
generate
electricity
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152
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2
answers
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
May 1, 2018
by
anonymous
The motor used for electric traction is
The motor used for electric traction is (1) D.C. shunt motor (3) D.C. series motor (2) D.C. compound motor (4) Synchronous motor
Last answer:
The motor used for electric traction is D.C. series motor
motor
used
electric
traction
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1.0k
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1
answer
asked
Apr 29, 2018
by
anonymous
The storage battery generally used in electric power stations is
The storage battery generally used in electric power stations is (1) zinc carbon battery (2) lead acid battery (3) nickel cadmium battery (4) lithium -ion battery
Last answer:
The storage battery generally used in electric power stations is lead acid battery
storage
battery
used
electric
power
stations
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91
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1
answer
asked
Mar 20, 2018
by
anonymous
The electric motor used in portable drills is?
Last answer:
The electric motor used in portable drills is universal motor.
electric
motor
used
portable
drills
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35
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1
answer
asked
Aug 15, 2019
by
anonymous
Electric Current
Electric Current
Last answer:
Electric current is the flow of charges. The electrons flow from higher density area of electrons to lowers density area of electrons. The terminal of battery which we called positive terminal of ... circuit is called electric current. The unit of electric current is Coulomb per Second or Ampere.
electric
current
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132
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4
answers
asked
Jun 28, 2019
by
anonymous
What is the unit of electric current?
A) Watt B) Volts C) Farad D) Ampere
Last answer:
Correct answer: D) Ampere
electric
unit
current
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2.5k
views
1
answer
asked
Sep 4, 2018
by
anonymous
State various effects of electric current and explain any one.
State various effects of electric current and explain any one.
Last answer:
Effects of Electric Current: 1. Magnetic Effect: When a current is passed through a conductor, magnetic field is produced round the conductor. Due to this field when current carrying ... The rise in temperature is converted into elongation of hot wire element causes displacement of pointer.
state
various
effects
electric
current
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68
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2
answers
asked
Mar 25, 2018
by
anonymous
Electric current passing through the circuit produces?
Electric current passing through the circuit produces?
Last answer:
Electric current passing through the circuit produces thermal effect.
electric
current
circuit
produces
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72
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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
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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2.5k
views
1
answer
asked
Mar 10, 2018
by
anonymous
What do you mean by electromagnetic field?
What do you mean by electromagnetic field?
electromagnetic
field
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59
views
0
answers
asked
Mar 19, 2018
by
anonymous
How can BJT be used as an amplifier?
How can BJT be used as an amplifier?
bjt
used
amplifier
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65
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0
answers
asked
Mar 25, 2018
by
anonymous
Permeability in a magnetic circuit corresponds to______ in an electric circuit.
Permeability in a magnetic circuit corresponds to______ in an electric circuit.
Last answer:
Permeability in a magnetic circuit corresponds to conductivity in an electric circuit.
permeability
magnetic
circuit
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100
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1
answer
asked
May 8, 2018
by
anonymous
An _____________is a network of electrical components used to supply, transfer and use electric power:
An _____________is a network of electrical components used to supply, transfer and use electric power: (A) Electric power system (B) Electric power (C) All of the above (D) None of the above
Last answer:
An Electric power system is a network of electrical components used to supply, transfer and use electric power.
use
electric
power
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68
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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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258
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1
answer
asked
Mar 15, 2018
by
anonymous
How eddy current can be minimized?
How eddy current can be minimized?
eddy
current
minimized
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57
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0
answers
asked
Mar 25, 2018
by
anonymous
A field of force can exist only between?
A field of force can exist only between?
Last answer:
A field of force can exist only between two ions.
field
force
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98
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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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1
answer
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