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Principles of Electromechanics. Electricity  Motion Electricity  Motion: Motor Motion  Electricity : Generator  Magnetic Field & Faraday’s Law. N. S. Magnetic Field. Generation of magnetic field Permanent Magnet:

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principles of electromechanics
Principles of Electromechanics

Electricity  Motion

Electricity  Motion: Motor

Motion  Electricity: Generator

 Magnetic Field & Faraday’s Law

magnetic field
N

S

Magnetic Field
  • Generation of magnetic field
    • Permanent Magnet:
    • Electric Current: using right hand rule to determine the field direction
      • Straight current
      • Current coil
current motion current in magnetic field
× × × × × ×

× × × × × ×

× × × × × ×

× × × × × ×

× × × × × ×

× × × × × ×

× × × × × ×

-q

V

× × × × × ×

× × × × × ×

× × × × × ×

× × × × × ×

× × × × × ×

× × × × × ×

× × × × × ×

I

F

r

F

Current  Motion: Current in magnetic field
  • Magnetic field will exert a force on a current
  • Magnetic field will exert a force on a moving charge
circular motion plane b
× × × × × ×

× × × × × ×

× × × × × ×

× × × × × ×

× × × × × ×

× × × × × ×

× × × × × ×

-q

V

F

r

Circular Motion: Plane  B

Helical path: V||0

Circular path: V||=0

charges in b field applications
Charges in B field: Applications

Cyclotron (accelerator)

Mass Spectrometer:

example rail gun
Example: Rail Gun

Acceleration: 5  106 g

Final speed: 1 km/s

Duration: 1 ms

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