Skip to content

Course home

Sign up

4.2 Uses of magnetism

EasyMediumHard
123456789101112131415161718192021222324252627282930
Question 15
H

A wire carries a current of 2.5 A at right angles to a magnetic field of magnetic flux density 0.080 T0.080\ \text{T}0.080 T. The force on the wire is 12 mN.

What length of wire is in the magnetic field?

[1]
A

60 m60\ \text{m}60 m

B

0.15 m0.15\ \text{m}0.15 m

C

0.0024 m0.0024\ \text{m}0.0024 m

D

0.060 m0.060\ \text{m}0.060 m

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