EARTH SCIENCE
MAGNETISM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Some objects that normally aren’t magnetic can become magnetized when connected to a circuit. Items that are magnetized in this way are called ____
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electromagnets
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electrons
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electrochromic devices
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permanent magnets
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Explanation:
Detailed explanation-1: -Explanation: An electromagnet is called a temporary magnet because it produces a magnetic field only when the current flows in its coil.
Detailed explanation-2: -An electromagnet is a type of magnet in which the magnetic field is produced by an electric current.
Detailed explanation-3: -An electromagnet is a magnet whose magnetic field is generated by a current flow. Wire wrapped into a coil is used to make electromagnets. A current flowing through the wire produces a magnetic field focused in the aperture, which serves as the coil’s core.
Detailed explanation-4: -The most common metals used for permanent magnets are iron, nickel, cobalt and some alloys of rare earth metals.
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