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Electricity, magnetism and electromagnetism
Quick questions on Magnetism, electromagnets and the motor effect - CCEA GCSE Physics
5short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is the field around a current-carrying wire?Show answer
When a current flows through a wire, it creates a circular magnetic field around the wire. Coiling the wire into a solenoid concentrates the field, giving a pattern like a bar magnet, with a north and south end.
What is the electric motor?Show answer
In a simple motor, a coil carrying a current sits in a magnetic field. The motor effect pushes one side of the coil up and the other down, making it turn. A split-ring commutator reverses the current every half-turn so the coil keeps spinning in the same direction.
What is q1?Show answer
State two ways to increase the strength of an electromagnet. [2 marks]
What is q2?Show answer
Which rule gives the direction of the force in the motor effect? [1 mark]
What is q3?Show answer
What is the role of the split-ring commutator in a motor? [2 marks]
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