Edexcel IGCSE Physics 6.14 Changing Magnetic Force Questions
Compare how changing current or magnetic-field strength and direction affects force on a conductor, then interpret practical measurements and graph lines.
Syllabus
First assessment 2019
Course
Physics 4PH1
Exam points
Explain how increasing current or magnetic-field strength increases the force on a current-carrying conductor.
Interpret experimental graph lines after current changes, using the gradient and zero-current reading to show the change in force.
Explain how reversing current changes the force direction, and why reversing both current and magnetic field leaves it unchanged.
Edexcel IGCSE Physics 6.14 Changing Magnetic Force Questions question 1
[Maximum number: 2]
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 one method of increasing the magnitude of the magnetic force on the wire.
Either: - increase the current - by increasing the voltage of the power supply
Or: - increase the magnetic field strength - by using stronger magnets / moving the poles closer together
Ignore: - unqualified reference to increasing the turns / creating a coil