CAIE IGCSE Physics 4.5.4.2 Relative Directions of Force Magnetic Questions

Learn to determine motor-effect force and turning directions using magnetic-field and current orientation.

Exam points

determine the direction of force on a current-carrying conductor in a magnetic field
use Fleming rules to predict movement and turning direction for coils and wires
explain how reversing current or magnetic field reverses the motor-effect force

[Maximum number: 2]

Fig. 8.1 shows the single turn coil of a simple direct current (d.c.) motor.

Fig. 8.1

Explain the direction of the turning effect as seen by an observer at O .

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