Edexcel IGCSE Physics 6.12 Motor effect applications
Practise explaining motor-effect devices, linking current, magnetic fields, forces, commutators and loudspeaker vibrations.
- Syllabus
- First assessment 2019
- Course
- Physics 4PH1
Exam points
- explain how interacting magnetic fields produce forces on the sides of a motor coil
- link brushes and a split-ring commutator to current reversal every half-turn
- describe how an a.c. loudspeaker coil makes a cone vibrate and produce sound
6.12 Motor effect applications question 1
Diagram 1 shows some apparatus used to demonstrate the magnetic force on a current-carrying wire in a magnetic field.
Diagram 1
The wire has a mass of 6.5 g .
Explain how the circuit could be changed to make the wire vibrate.
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