PH 122 Chapter Notes - Chapter 28: Magnetic Monopole, Test Particle, Electric Field

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19 May 2015
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28-1 magnetic fields and the definition of: magnetic fields can be produced by, moving electrically charged particles to make an electromagnet, using elementary particles that have already intrinsic magnetic fields. Permanent magnets have permanent magnetic fields because they use materials which have intrinsic magnetic fields. The direction of can be given by the right-hand rule; the sign of determines whether the opposite direction. Presumably, if the same; if is negative, it is in the opposite direction. is in the same direction as the cross-product or in is positive, then the direction is. The magnitude of is directly proportional to the angle ( ) between the: opposite magnetic poles attract each other; like magnetic poles repel each other. directions of and. , turn on the magnetic field and adjust its value until the beam returns to the undeflected position; when the forces are in opposition, they are made to cancel.

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