126.96.36.199 Fleming’s left-hand rule (HT only)
4.1.3 National and global energy resources
- When a conductor carrying a current is placed in a magnetic field the magnet producing the field and the conductor exert a force on each other. This is called the motor effect.
- Students should be able to show that Fleming’s left-hand rule represents the relative orientation of the force, the current in the conductor and the magnetic field.
- Students should be able to recall the factors that affect the size of the force on the conductor.
- For a conductor at right angles to a magnetic field and carrying a current:
- force = magnetic flux density × current × lengthF=BIl
- force, F, in newtons, N
- magnetic flux density, B, in tesla, T
- current, I, in amperes, A (amp is acceptable for ampere) length, l, in metres, m
MS 3b Change the subject of an equation
MS 3c Substitute numerical values into algebraic equations using appropriate units for physical quantities
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