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2 cards from this section. Quick, good the night before a test.
Who discovered that electric current affects a magnetic compass needle?
Look for the physicist known for electromagnetism.
What do iron filings demonstrate when sprinkled near a current-carrying wire?
Think about visual patterns created around something.
What did Oersted demonstrate about electric currents?
Recall the compass needle experiment.
True or False: A magnetic field can exist without current.
Consider permanent magnets.
Explain how Oersted's discovery paved the way for modern technologies. Provide at least three examples.
Think about the devices and technologies you use today that rely on electromagnetism.
Demonstrate through calculations how increasing current in a coil can alter the magnetic field. Given a coil with 10 turns, what is the change in the magnetic field if the current rises from 2A to 4A?
Consider the relationship between current and magnetic field strength.
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