Electro-Magnetism © David Hoult 2009. Magnetic Field Shapes © David Hoult 2009

  • View
    221

  • Download
    2

Embed Size (px)

Text of Electro-Magnetism © David Hoult 2009. Magnetic Field Shapes © David Hoult 2009

  • Slide 1
  • Electro-Magnetism David Hoult 2009
  • Slide 2
  • Magnetic Field Shapes David Hoult 2009
  • Slide 3
  • Magnetic fields are represented by lines called lines of magnetic force or lines of magnetic flux David Hoult 2009
  • Slide 4
  • Magnetic fields are represented by lines called lines of magnetic force or lines of magnetic flux These lines show the direction of the force which would act on a free north magnetic pole placed in the field David Hoult 2009
  • Slide 5
  • Magnetic fields are represented by lines called lines of magnetic force or lines of magnetic flux These lines show the direction of the force which would act on a free north magnetic pole placed in the field However, since free north magnetic poles dont exist... think of the lines as showing which way a very small compass would point if placed in the field David Hoult 2009
  • Slide 6
  • Magnetic fields are represented by lines called lines of magnetic force or lines of magnetic flux These lines show the direction of the force which would act on a free north magnetic pole placed in the field However, since free north magnetic poles dont exist... think of the lines as showing which way a very small compass would point if placed n the field The density of lines on a diagram indicates the strength of the magnetic field David Hoult 2009
  • Slide 7
  • Field due to a straight current-carrying conductor David Hoult 2009
  • Slide 8
  • Field due to a straight current-carrying conductor David Hoult 2009
  • Slide 9
  • It is found that a compass always points perpendicular to the conductor so we conclude that the lines form circles (or cylinders) round the conductor David Hoult 2009
  • Slide 10
  • To remember the sense of the magnetic field, think about David Hoult 2009
  • Slide 11
  • To remember the sense of the magnetic field, think about opening a bottle of wine. David Hoult 2009
  • Slide 12
  • To remember the sense of the magnetic field, think about opening a bottle of wine. David Hoult 2009
  • Slide 13
  • To remember the sense of the magnetic field, think about opening a bottle of wine. demo... David Hoult 2009
  • Slide 14
  • To remember the sense of the magnetic field, think about opening a bottle of wine. David Hoult 2009
  • Slide 15
  • Field due to a short current-carrying coil of wire David Hoult 2009
  • Slide 16
  • Field due to a short current-carrying coil of wire David Hoult 2009
  • Slide 17
  • Field due to a short current-carrying coil of wire David Hoult 2009
  • Slide 18
  • Field due to a long current-carrying coil of wire (also called a solenoid) David Hoult 2009
  • Slide 19
  • Field due to a long current-carrying coil of wire (also called a solenoid) David Hoult 2009
  • Slide 20
  • Field due to a long current-carrying coil of wire (also called a solenoid) David Hoult 2009
  • Slide 21
  • This field is similar to that of a bar magnet David Hoult 2009
  • Slide 22
  • This field is similar to that of a bar magnet David Hoult 2009
  • Slide 23
  • This field is similar to that of a bar magnet David Hoult 2009
  • Slide 24
  • This field is similar to that of a bar magnet David Hoult 2009
  • Slide 25
  • This field is similar to that of a bar magnet David Hoult 2009
  • Slide 26
  • Current into plane of diagram David Hoult 2009
  • Slide 27
  • Current into plane of diagram Current out of plane of diagram David Hoult 2009
  • Slide 28
  • Fields due to two parallel current-carrying conductors David Hoult 2009
  • Slide 29
  • Fields due to two parallel current-carrying conductors Currents flowing in the same sense David Hoult 2009
  • Slide 30
  • Fields due to two parallel current-carrying conductors Currents flowing in the same sense David Hoult 2009
  • Slide 31
  • Fields due to two parallel current-carrying conductors Currents flowing in the same sense David Hoult 2009
  • Slide 32
  • Fields due to two parallel current-carrying conductors Currents flowing in the same sense David Hoult 2009
  • Slide 33
  • Fields due to two parallel current-carrying conductors Currents flowing in the same sense David Hoult 2009
  • Slide 34
  • Fields due to two parallel current-carrying conductors Currents flowing in the same sense The two conductors attract each other David Hoult 2009
  • Slide 35
  • Currents flowing in opposite sense David Hoult 2009
  • Slide 36
  • Close to the conductors the field is very nearly circular David Hoult 2009
  • Slide 37
  • Slide 38
  • The field is similar in shape to the field of a David Hoult 2009
  • Slide 39
  • The field is similar in shape to the field of a short coil David Hoult 2009
  • Slide 40
  • The field is similar in shape to the field of a short coil The two conductors repel each other David Hoult 2009