Cambridge IGCSE Physics
4.5.3Magnetic effect of a current
Magnetic effect of a current in Cambridge IGCSE Physics: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic14 practice questions1 lesson
Learning objectives
What the syllabus expects you to be able to do.
- 4.5.3.1Describe the pattern and direction of the field around a straight wire and a solenoid carrying a current.
- 4.5.3.2Describe an experiment to find these field patterns and their direction.
- 4.5.3.3Describe how relays and loudspeakers use the magnetic effect of a current, with examples.
- 4.5.3.4Supplement: state qualitatively how the field strength varies around a straight wire and a solenoid.
- 4.5.3.5Supplement: describe how changing the size and direction of the current changes the field.
Lessons
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The magnetic effect of a current
30 min
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Sample question
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Turn Magnetic effect of a current into a strength.
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