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4 cards from this section. Quick, good the night before a test.
What defines a magnetic field?
Think about where a magnet can attract or repel objects.
What do like poles do?
Consider what happens when you try to push two north poles together.
What is the direction of magnetic field lines?
Remember the saying, 'N to S, that's how they flow!'
True or False: Paramagnetic materials retain magnetism once the magnetic field is removed.
Think about what happens when you take away a magnet from an object.
A solenoid with 100 turns carrying a current of 4A creates a magnetic field. How strong is this magnetic field if the solenoid is 0.1m in length? Use the equation B = μ₀(nI) where n = turns per unit length.
Focus on converting turns per unit length accurately.
Describe how the principle of electromagnetic induction is utilized in electric generators and why this is significant for power generation.
Think about how kinetic energy is transformed into electrical energy and its importance.
5 more questions in this section. Enroll free to practise them all.
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