| Question | Answer |
| Force on current-carrying conductor in magnetic field | F = ILB |
| Reason for force occurring on a current-carrying conductor in a magnetic field | The conductor has a magnetic field around it, which interacts with the magnetic field it is placed in, and this creates a force |
| Thumb in left hand rule | Direction of force |
| First finger in left hand rule | Direction of magnetic field |
| Second finger in left hand rule | Direction of current |
| Force on a charged particle moving through a magnetic field | F = qvB |
| Forces between currents | If two current-carrying conductors are placed in close proximity to one another, they will exert a force on one another due to their magnetic fields |
| Ampere | the steady current which, if maintained in two straight parallel conductors of infinite length, of negligible cross section and placed one metre apart in a vacuum would produce a force on each conductor of 2 × 10*-7 newtons per metre of length |
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