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Why do many devices using electromagnets also need a permanent

Why do many devices using electromagnets also need a permanent magnet?A. because the devices need a second magnetic field to
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Determine the difference between permanent magnets and electromagnets.(1 point)Responses Electromagnets are made by using a
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What is different between a permanent magnet and an electromagnet.Electromagnets can be turned off and on; permanent magnets
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1. Name one thing in your home that is a magnet and one that is an electromagnet.2. Why are electromagnets preferred in the real
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2. asked by A
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Explain how magnets are helpful. What are some real-world applications of how permanent magnets and/or electromagnets are used?
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2. asked by NOAH
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In Two sentences, explain how magnets are helpful. What are some real world applications of how permanent magnets and or
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Select the statement that is NOT true.* 5 points There is a magnetic field for magnets and electromagnets. The power for an
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2. asked by reee
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1. How did Oersted discover electromagnetism?2. How did Oersted’s discovery influence the history of science? 3. What are
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1. How did Oersted discover electromagnetism?2. How did Oersted’s discovery influence the history of science? 3. What are
1. 1 answer
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Explain how magnets are helpful. What are some real-world applications of how permanent magnets and/or electromagnets are used?
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2. asked by the daudh8ayw
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