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

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

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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)

## Related Questions

Why does the magnetic field flow from north to south?

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

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

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

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

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.

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

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.

Last Answer : To avoid the effect of stray magnetic field in A.C. bridges we can use magnetic screening.

Briefly describe the electric field of a static charge.

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

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

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

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.

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.

What is the direction of the induced electric field?
Last Answer : It  is  in  opposite  direction   to  the  one  that   produced  it.

Can the electric field between two positive charges be zero?
Last Answer : It  can  only  if  they  have  equal  charges.

What is the direction of the electric field?
Last Answer : Electric   field    is  at   right angle   widh  flow  of  current  (right  hand   rule).

Compare electric and magnetic circuit.
Last Answer : Comparison between Magnetic and Electric Circuits

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

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

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.

How do we use nuclear energy to generate electricity?
Last Answer : nuclear energy is produce by nuclei of atom

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.

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

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.

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.

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.

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

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.

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

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)

What do you mean by electromagnetic field?

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

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

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

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

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

Last Answer : The inverse definite mean time relays are used for over current and earth fault protection of transformer against internal short-circuits.

What type of meter is used to measure current?

What are the electromagnetic waves used in remote control?

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.

How to Kick a Football Field Goal
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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.

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.

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.