Skip to content

Course home

Sign up

4.2 Uses of magnetism

EasyMediumHard
123456789101112131415161718192021222324252627282930
Question 29
H

Which statement describes how a loudspeaker produces sound?

[1]
A

Sound waves move a coil in a magnetic field, which induces a p.d. that vibrates the cone

B

A varying current in a coil in a magnetic field gives a varying force that vibrates the cone

C

A steady current in a coil in a magnetic field gives a steady force that vibrates the cone

D

A varying current induces a p.d. across the magnet, which makes the magnet vibrate the air

Markscheme

4.2 Uses of magnetism Questions

  1. GCSE
  2. /Physics
  3. /4.2 Uses of magnetism

48 exam-style questions on OCR GCSE Physics 4.2 Uses of magnetism, covering 4.2.1 The motor effect, 4.2.2 Fleming's left-hand rule, 4.2.3 The force on a current-carrying conductor, 4.2.4 The electric motor, 4.2.5 Electromagnetic induction, 4.2.6 Alternators and dynamos, 4.2.7 How transformers work, 4.2.8 Transformer turns ratio, 4.2.9 Potential differences and turns in transformers, and 4.2.10 Microphones, loudspeakers and headphones. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank