Multiple Choice Questions on Rare Earth Magnets are permanent magnets utilizing alloys of Rare Earth Elements REEs like neodymium........... for UPSC Civil Services Examination (General Studies) Preparation

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Multiple Choice Questions

Rare Earth Magnets are permanent magnets utilizing alloys of Rare Earth Elements REEs like neodymium...........

Geography Minerals
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    Rare Earth Magnets are permanent magnets utilizing alloys of Rare Earth Elements (REEs) like neodymium, praseodymium, dysprosium, and samarium, and are known for their high magnetic strength.

    Which of the following statements correctly identifies the characteristics and limitation of Neodymium-Iron-Boron (NdFeB) magnets?

    Features low magnetic strength, used in smartphonesIncorrect Answer
    Corrosion resistant, used in aerospaceIncorrect Answer
    High magnetic strength, vulnerable to corrosionCorrect Answer
    Low-temperature resistance, used in underwater detectionIncorrect Answer
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    Explanation:

    1: NdFeB magnets actually have high magnetic strength and are used in larger applications like EVs, not just small electronics like smartphones.

    2: While used in many industries, NdFeB magnets are susceptible to corrosion, so this option is incorrect.

    3: NdFeB magnets indeed have high magnetic strength but are vulnerable to corrosion, making this statement correct.

    4: NdFeB magnets are used in various applications, but they don't have low-temperature resistance; their limitation is in high temperatures.

    By: susheel
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