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5 cards from this section. Quick, good the night before a test.
What do magnetic field lines represent?
Think about how they show the invisible forces around magnets.
Do like poles attract or repel?
Consider how magnets behave when brought next to each other.
What do magnetic field lines indicate?
Think about what a dense cluster of lines would mean.
True or False: Opposite poles of magnets attract.
Recall how magnets behave when placed close to one another.
A current-carrying wire with a length of 3 m carries 4 A of current and is placed in a magnetic field of strength 0.5 T at an angle of 60 degrees. What is the force acting on the wire?
Make sure to use the sine of the angle in your calculations.
If a generator produces an electric current of 10 A with 5 turns of wire in a changing magnetic field, what factors can you adjust to increase the induced current?
Think about how changing design variables affects inductance.
7 more questions in this section. Enroll free to practise them all.
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