GK
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which metal is commonly used for making an electromagnet?
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Iron
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Nickel
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Cobalt
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Copper
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Explanation:
Detailed explanation-1: -Materials used for making electromagnets should have best magnetising and demagnetising property. Among Stainless Steel, silver, soft Iron and Nickel, Soft Iron has best magnetising and demagnetising property. Therefore, Soft Iron is most suitable.
Detailed explanation-2: -Electromagnets are made from a coil of copper wire wound around a core made from iron, nickel or cobalt. The coiled wire will generate a magnetic field when an electric current passes through it, however, the magnetic field disappears the moment the current stops. Electromagnets need electricity to work. Iron.
Detailed explanation-3: -Conclusion: The core of an electromagnet must be made up of soft iron.
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