EARTH SCIENCE
MAGNETISM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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One that is always magnetic
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One magnet that is controlled through an electric current
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a refrigerator magnet
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Does not have a north and south pole
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Detailed explanation-1: -An electromagnet is a temporary magnet made by winding a coil of wire around a piece of soft iron. Q. A solenoid is used as a temporary magnet (an electromagnet).
Detailed explanation-2: -An electromagnet is a temporary magnet. An electromagnet has a magnetic field created by electric current.
Detailed explanation-3: -Explanation: An electromagnet is called a temporary magnet because it produces a magnetic field only when the current flows in its coil. The magnetic field vanishes when the current is switched off.
Detailed explanation-4: -Temporary magnets are made of soft metals that are magnetised only when exposed to a permanent magnetic field or an electric current. When they come into contact with a magnetic field, they become magnetized. When the magnetic field is removed, they gradually lose their magnetism.
Detailed explanation-5: -Paperclips, iron nails and other similar items are examples of temporary magnets.