How can a magnetic field be used to generate an electric current?

110 views
How can a magnetic field be used to generate an electric current?
by

1 Answer

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)
Like 0 like
by

Please log in or register to answer this question.

Related questions

41 views
Why does the magnetic field flow from north to south?

Description : Why does the magnetic field flow from north to south?

0 answers
319 views
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.

Description : 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

1 answer
182 views
What arc the errors occurring in measuring devices due to stray magnetic field and temp '? Explain how to compensate them.

Description : 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 

1 answer
292 views
Derive an expression for energy stored in a magnetic field .

Description : 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 

1 answer
90 views
Give the relation between magnetic field strength, magnetic flux density and permeability.

Description : Give the relation between magnetic field strength, magnetic flux density and permeability.

0 answers
116 views
Define magnetic field strength and state its unit.

Description : 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.

1 answer
88 views
Which of the following laws relates the magnetic field to the magnitude, direction, length, and proximity

Description : 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

1 answer
2.4k views
Which of the following statements is not characteristic of a static magnetic field?

Description : 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.

1 answer
153 views
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.

1 answer
83 views
Briefly describe the electric field of a static charge.

Description : Briefly describe the electric field of a static charge.

0 answers
161 views
The ability of materials to become polarized under an applied electric field is called _______

Description : 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

1 answer
136 views
The electric field inside a hollow conducting sphere ________

Description : 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

1 answer
102 views
MOSFET uses the electric field of?

Description : MOSFET uses the electric field of?

Last Answer : MOSFET uses the electric field of gate capacitance.

1 answer
189 views
An electric motor in which both stator field and rotor rotates with same speed is called?

Description : 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.

1 answer
99 views
Is electric potential zero when electric field is zero?

Description : 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.

1 answer
80 views
What is the direction of the induced electric field?

Description : What is the direction of the induced electric field?

Last Answer : It  is  in  opposite  direction   to  the  one  that   produced  it.

1 answer
82 views
Can the electric field between two positive charges be zero?

Description : Can the electric field between two positive charges be zero?

Last Answer : It  can  only  if  they  have  equal  charges.

1 answer
129 views
What is the direction of the electric field?

Description : What is the direction of the electric field?

Last Answer : Electric   field    is  at   right angle   widh  flow  of  current  (right  hand   rule).

1 answer
416 views
Compare electric and magnetic circuit.

Description : Compare electric and magnetic circuit.

Last Answer : Comparison between Magnetic and Electric Circuits

5 answers
750 views
Explain hysteresis loss, eddy current loss and skin effect limitations with reference to magnetic material.

Description : 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:

1 answer
224 views
State the material used for making (1) Magnetic Core (2) Fuse element

Description : 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 

1 answer
87 views
Explain the electrical losses of magnetic materials used for the cores of inductors and transformer.

Description : Explain the electrical losses of magnetic materials used for the cores of inductors and transformer.

0 answers
176 views
What do we use to generate electricity?

Description : 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.

2 answers
166 views
How do we use nuclear energy to generate electricity?

Description : How do we use nuclear energy to generate electricity?

Last Answer : nuclear energy is produce by nuclei of atom

2 answers
69 views
What do you mean by electromagnetic field?

Description : What do you mean by electromagnetic field?

0 answers
159 views
Electric Current

Description : 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.

4 answers
2.6k views
What is the unit of electric current?

Description : A) Watt B) Volts C) Farad D) Ampere

Last Answer : Correct answer: D) Ampere

1 answer
1.1k views
List out any four effects of electric current used in measuring instruments & write name of meter working on it.

Description : 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.

1 answer
129 views
State various effects of electric current and explain any one.

Description : 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. 

2 answers
170 views
When electric current passes through a bucket full of water, lot of bubbling is observed...

Description : 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.

1 answer
260 views
When electric current passes through a metallic conductor, its temperature rises. This is due to?

Description : 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.

1 answer
148 views
Electric current passing through the circuit produces?

Description : Electric current passing through the circuit produces?

Last Answer : Electric current passing through the circuit produces thermal effect.

1 answer
234 views
Heat in a conductor is produced on the passage of electric current due to?

Description : 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.

1 answer
488 views
An instrument which detects electric current is known as?

Description : An instrument which detects electric current is known as?

Last Answer : An instrument which detects electric current is known as galvanometer.

1 answer
173 views
What is the direction of flow of electric current in an electric circuit?

Description : 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)

1 answer
206 views
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.

Description : 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

1 answer
1.1k views
The motor used for electric traction is

Description : 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

1 answer
107 views
The storage battery generally used in electric power stations is

Description : 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 

1 answer
57 views
The electric motor used in portable drills is?

Last Answer : The electric motor used in portable drills is universal motor.

1 answer
2.3k views
Eddy current damping cannot be used for moving iron instrument because

Description : 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

1 answer
2.6k views
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.

1 answer
2.7k views
What type of meter is used to measure current?

Description : What type of meter is used to measure current?

Last Answer : Ammeter

3 answers
66 views
What are the electromagnetic waves used in remote control?

Description : What are the electromagnetic waves used in remote control?

0 answers
618 views
Permeability in a magnetic circuit corresponds to______ in an electric circuit.

Description : 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.

1 answer
8 views
How to Kick a Football Field Goal

Description : How to Kick a Football Field Goal

Last Answer : How to Kick a Football Field Goal There are only a few seconds left in the game, and one field goal attempt is all that stands between you and gridiron glory, or a place in the Hall of Shame. ... right kick for the right play, and get that game-winning field goal just right between the goal posts.

1 answer
16 views
How to Plow a Field

Description : How to Plow a Field

Last Answer : How to Plow a Field Civilization began when human beings started to turn over the soil to plant food. Plowing may have come a long way since the first human beings used their hands and ... budget. With these tools, you can plow fields and help contribute to the advancement of human civilization.

1 answer
3 views
How to Field Dress a Deer ?

Description : How to Field Dress a Deer ?

Last Answer : How to Field Dress a Deer If you enjoy hunting deer, there's one important task you need to do before you can haul your prized catch back home: you'll need to field dress it. Field dressing ... you go hunting. Just follow these steps and you'll bring your prized catch home without any trouble.

1 answer
158 views
State advantages of rotating field type alternators.

Description : 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. 

1 answer
71 views
Field intensity formula

Description :  Field intensity formula

Last Answer :  Field intensity formula

1 answer
...