A laboratory technician calibrates a force-balance apparatus using a straight conductor placed in the gap of an electromagnet. The conductor segment in the field is at right angles to the magnetic field.
| Quantity | Value |
|---|---|
| Magnetic flux density, BBB | 0.42 T0.42\ \text{T}0.42 T |
| Current, III | 2.0 A |
| Length of conductor in the field, lll | 3.5 cm |
For a conductor at right angles to a magnetic field, F=B×I×lF = B \times I \times lF=B×I×l.
Calculate the force on the conductor segment.
Give your answer in standard form.
86 exam-style questions on Edexcel GCSE Physics 12.3 The motor effect, covering 12.3.1 The motor effect, 12.3.2 Fleming's left-hand rule, 12.3.3 Force on a conductor, and 12.3.4 Electric motors. Each one has a worked solution and a mark scheme showing where the marks go.