Skip to content
BvunzoHub

Menu

Get full accessSign in

Cambridge AS & A Level Physics

20.4Magnetic fields due to currents

Magnetic fields due to currents in Cambridge AS & A Level Physics: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic18 practice questions1 lesson
Practise this topicAll Physics topics

Learning objectives

What the syllabus expects you to be able to do.

  1. 20.4.1Sketch the field patterns of a long straight wire, a flat circular coil and a long solenoid.
  2. 20.4.2Recognise that a ferrous core increases the field of a solenoid.
  3. 20.4.3Explain the forces between current-carrying conductors and find their directions.

Lessons

  • Magnetic fields and the fields of currents

    40 min

    Full access

Join to read every lesson, or see what Full access includes.

Sample question

A sample question on this topic. Answer it, check it, then read the worked answer.

Magnetic fields due to currents: sample question

1 mark

A long straight wire lies in the plane of the page and carries a current vertically up the page. What is the direction of its magnetic field at a point just to the right of the wire?

Choose one answer

Turn Magnetic fields due to currents into a strength.

Practise with instant marking, see your mastery grow and get a study plan built around your exam date.

Start learningPhysics topics