Learning objective

Understand that a coil carrying an electric current within a magnetic field can experience a rotational force, which can be enhanced by increasing: (a) the number of coil turns (b) the electric current (c) the magnetic field strength

Read the explanation, check the common trap, then practise with flashcards and questions.

Exam focus

Cambridge IGCSE PhysicsElectricity and magnetismCore content

Study support

Understand this objective

Quick explanation

This point belongs to The d.c. motor, especially The d.c. motor outcomes.
You need to be able to understand that a coil carrying an electric current within a magnetic field can experience a rotational force, which can be enhanced by increasing: (a) the number of coil turns (b) the electric current (c) the magnetic field strength.
The key ideas to know are Know, Understand, and Explain.
Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

KnowUnderstandExplain

Why it matters

This objective helps connect The d.c. motor outcomes to exam-style questions, flashcards, and revision notes for The d.c. motor.

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