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The motor effect, motors and loudspeakers · GCSE Physics · Courselo

Courselo

GCSE Physics
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Magnetism and electromagnetism

The motor effect, motors and loudspeakers

Magnetism and electromagnetism · Lesson 3 of 4

Lesson 3 of 4

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Unit 8

Magnetism and electromagnetism

4 lessons · 6 h of study

Permanent magnets, magnetic fields and induced magnetism1 h 15 min of study
Electromagnets, solenoids and practical uses1 h 30 min of study
The motor effect, motors and loudspeakersReading · 0%
Electromagnetic induction, generators and transformers1 h 45 min of study

This unit is ≈8% of the GCSE Physics, across 4 lessons. Full syllabus

Lesson 3 of 4 · Magnetism and electromagnetism

The motor effect, motors and loudspeakers

3 quick checks≈1% of the testCore: Core: tested on most papers

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By the end you’ll be able to

describe the motor effect as the force experienced by a current-carrying conductor placed in a magnetic field
predict the direction of the force on a conductor using Fleming’s left-hand rule
state and apply the relationship $$F = B I l$$ for a conductor at right angles to the magnetic field, where required by the specification used

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Adaptive questions on the motor effect, motors and loudspeakers.

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explain why the force increases when the magnetic flux density, current or length of conductor in the field increases

explain how a simple d.c. motor works, including the roles of the coil, magnetic field, split-ring commutator and brushes in producing continued rotation

explain how a loudspeaker works by applying the motor effect to a coil attached to a cone, and relate changing current to cone vibrations and sound waves

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