Physics A2 Level

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Author:
koolcookie11
ID:
125015
Filename:
Physics A2 Level
Updated:
2011-12-26 09:38:52
Tags:
physics alevel magnetic fields
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Description:
Magnetic Fields
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  1. Magnetic flux density
    • force on a current carrying wire in a magnetic field when at right angles
    • When perpendicular F=BIl
    • Fleming's left hand rule:
    • Magnetic flux density is also called field strength, B
    • Tesla=Wb/m2
  2. Moving charges in a magnetic field
    • When the field is perpendicular to velocity, F=Bqv
    • charged particles in a magnetic field are deflected in a circular path
    • Effect used in cyclotrons
  3. Magnetic flux and flux linkage
    • Magnetic flux, φ = BA
    • Flux linkage, Nφ = BAN
    • Rectangular coil:

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