Edexcel A-Level Physics A2 4.4.107 Force on a Current Carrying Conductor Questions

Practise Edexcel A-Level Physics force on current-carrying conductors by calculating BIL forces, directions and coil moments.

Exam points

use F equals BIL sin theta to calculate force, current, length or magnetic flux density
apply Fleming’s left-hand rule to decide conductor force direction in a magnetic field
calculate or explain coil moments and oscillation in motors and loudspeaker-style systems

[Maximum number: 3]

A music system has a number of loudspeakers. One loudspeaker produces the low frequency sounds. This loudspeaker consists of a coil connected to a cone. The coil is in a region of magnetic field produced by a permanent magnet, as shown.

Figure for Question Edexcel A-Level Physics A2 4.4.107 Force on a Current Carrying Conductor Questions question 1 — Edexcel A-Level Physics A2

Explain how an alternating current in the coil causes the cone to oscillate with the frequency of the alternating current.

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Edexcel A-Level Physics A2 4.4.107 Force on a Current Carrying Conductor Questions question 1