An experimental electromagnetic launcher consists of a conducting slider bridging two parallel horizontal guide rails, as shown in the diagram below.
A uniform vertical magnetic field of flux density B B\,B is directed upwards through the region containing the rails and the slider.
When a constant current is pulsed through the system, the slider accelerates uniformly from rest for a duration of 0.35 s before exiting the magnetic field.
You are given the following experimental parameters:
- Magnetic flux density, B=0.85 TB = 0.85\text{ T}B=0.85 T
- Constant current in the circuit, I=5.0 AI = 5.0\text{ A}I=5.0 A
- Effective length of the slider in the magnetic field, L=6.0 cmL = 6.0\text{ cm}L=6.0 cm
- Mass of the slider, m=15.0 gm = 15.0\text{ g}m=15.0 g
Calculate the maximum velocity of the slider as it exits the magnetic field, assuming resistance and friction are negligible.
The motor effect Questions
Practise AQA GCSE Physics The motor effect with exam-style questions for Foundation and Higher tier. 25 questions covering Electromagnetism, Fleming's left-hand rule (HT only), Electric motors (HT only), and Loudspeakers (physics only) (HT only), matched to the AQA GCSE Physics (8463) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.