CAIE A-Level Physics 20.3.1 Magnetic Force Direction

Practise determining the direction of magnetic force on positive and negative moving charges, using charge sign, velocity and field direction consistently.

Exam points

determine the direction of force on a charge moving in a magnetic field
use charge sign, velocity and field direction to interpret the force direction

[Maximum number: 1]

A uniform magnetic field is now applied in the region of the electric field in Fig. 5.1, so that the electron in (b)(iii) travels undeviated through the region.

Determine the direction of the uniform magnetic field.

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20.3.1—The direction of the force on a charge moving in a magnetic field question 1