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2 cards from this section. Quick, good the night before a test.
What is a magnetic field?
Think about where you feel the effects of magnets.
What do you use to determine the direction of a magnetic field around a current-carrying wire?
Remember: thumb for current, fingers for field direction.
What creates a magnetic field around a wire?
Think about what happens when you turn on a circuit.
The right-hand rule helps determine the direction of what?
Which direction does your thumb point if you think of current?
A straight wire of length 3m carries a current of 10A and is placed in a magnetic field of strength 0.5T at an angle of 30 degrees. Calculate the force acting on the wire.
Remember to use the sin function for the angle.
Explain how you would set up a simple experiment to demonstrate electromagnetic induction using a coil and a magnet.
Focus on movement through a coil; how does it create a current?
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