Production of current due to magnetic field

8/18/2019 Production of current due to magnetic field

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Spring 2008 1

GENERATION OF CURRENT INTHE PRESENCE OFMAGNETIC FIELD

Done by:

Viswanatha Sa!a"S#$%&&%'()*

+aishee +aishan,a#$%&&%'-&*

M"Hai,a Na.a Sai#$%&&%''/*


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Spring 2008 2

INTRODUCTION

Generally we use current to produce magnetic fieldaround the current carrying conductor. Here we are

using the technique of generating the current with the

help of magnetic field.


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Spring 2008 3

E0e1to!a.netis!E0e1to!a.netis!

• Electricity and magnetism are different facets ofelectromagnetism

– a moving electric charge produces magnetic fields

– changing magnetic fields move electric charges

• This connection first elucidated by Faraday, Mawell

• Einstein saw electricity and magnetism as frame!

dependent facets of unified electromagnetic force


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Spring 2008 4

Magnetic fields from electricity

• " static distribution of charges produces an electricfield

• #harges in motion $an electrical current% produce a

magnetic field

– electric current is an eample of charges $electrons% inmotion


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Spring 2008 5

E0e1to!a.nets

• "rranging wire in a coil and running a current

through produces a magnetic field that loo&s a lotli&e a bar magnet

– called an electromagnet

– putting a real magnet inside, can shove the magnet

bac& and forth depending on current direction' calleda solenoid


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Spring 2008 6

INTRODUCTION TO THE PRO+ECT

(n our pro)ect we use a circular wood consisting of circularmagnets around four to five. " *# motor is used to rotatethe circular wood with the help of shaft. #opper coils areplaced at the base of the shaft, while rotating, an emf is

induced in the copper coils and the copper coils may beused to generate electricity with the help of generator or wecan simply see whether the current is generated or not by

connection +E*s to the copper coils and the +E*s willglow.+ess power consumption and more power output which

is more useful.


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Spring 2008 7

#M-ET/ 0E12(0E*

Magnets +E*$+ight emitting diode%

#opper #oil

0otating /haft *# -ower /upply

Multimeter


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Spring 2008 8

PRINCIPLE AND 2OR3ING

" magnetic field is the magnetic effect of electric currentand magnetic materials. The magnetic field at any givenpoint is specified by both a ditrection and a magnitude $orstrength% as such it is a vector field.

#opper coils are placed at the base of the shaft, while rotating,an emf is induced in the copper coils and the copper coilsmay be used to generate electricity with the help ofgenerator.

we can simply see whether the current is generated or not byconnection +E*s to the copper coils and the +E*s will glow.

+ess power consumption and more power output which ismore useful


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Spring 2008 9


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Spring 2008 10

In451e4 C5ent

• The net part of the story is that a changing

magnetic field produces an electric current in aloop surrounding the field

– called electromagnetic induction, or Faraday3s +aw


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Spring 2008 11

The E0e1to!a.neti1 Conne1tion

• " changing magnetic field produces an electric field, and a

changing electric field produces a magnetic field.

• Electric and Magnetic fields can produce forces on charges

• "n accelerating charge produces electromagnetic waves$radiation%

• 4oth electric and magnetic fields can transport energy

– Electric field energy used in electrical circuits, e.g., released

in lightning

– Magnetic field carries energy through transformer, foreample


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Spring 2008 12

2ses of Electromagnetic 5aves• #ommunication systems

– ne!way and two!way

• 0adar

• #oo&ing $with microwaves%

• Medical (maging $6 rays%• 7ight 8ision9 $infrared%

• "stronomy $radio, µwave, (0, visible, 28, gamma%

All that we experience through our eyes is conveyed by

electromagnetic radiation…


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Spring 2008 13

APPLICATIONS

:.motors

;.transformers

Production of current due to magnetic field

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