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Askmemetallurgy Official
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Asked: 2020-05-11T16:29:39+05:30 In:

GATE MT 2020 Q34.

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89.83%A ( 53 voters )
1.69%B ( 1 voter )
8.47%C ( 5 voters )
0%D
Based On 59 Votes

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GATE MT 2020 Q34.
GATE MT 2020 Q34.
GATE MT 2020 Question Paper With SolutionGATE MT Physical metallurgyGATE MT Previous Year Questions With Solutionmaterial science
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    3 Answers

    1. Best Answer
      Platinum Gate aspirant.

      Ans A; adding some points Cu(I) is diamagnetic and Cu(II) is paramagnetic. Iron is Ferromagnetic as it can retain it's magnetic field even after removing the magnetic field. But only alpha Fe is Ferromagnetic below Curie temperature of 770°C , above this temp. Fe is paramagnetic. Mercury is superconRead more

      Ans A; adding some points

      Cu(I) is diamagnetic and Cu(II) is paramagnetic.

      Iron is Ferromagnetic as it can retain it’s magnetic field even after removing the magnetic field. But only alpha Fe is Ferromagnetic below Curie temperature of 770°C , above this temp. Fe is paramagnetic.

      Mercury is superconductor below 4K temperature.

      Si acts as insulator at Ok temperature and semiconductor in certain temperature ranges however it is one of semiconductors stable at higher temperature than other like Ge.

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      • official account of Askmemetallurgy

        Correct answer is option A. @Rohit.km described it best. Thank you. Some peripheral lines related to this topic: Ferromagnetism is the basic mechanism by which certain materials (such as iron) form permanent magnets, or are attracted to magnets. In superconductors, resistance decreases gradually asRead more

        Correct answer is option A. Rohit jha.km described it best. Thank you.

        Some peripheral lines related to this topic:

        • Ferromagnetism is the basic mechanism by which certain materials (such as iron) form permanent magnets, or are attracted to magnets.
        • In superconductors, resistance decreases gradually as its temperature is lowered even down to near absolute zero, and has a characteristic critical temperature below which the resistance drops abruptly to zero.
        • A semiconductor material has an electrical conductivity value falling between that of a conductor , such as metallic copper, and an insulator, such as glass. Its resistance falls as its temperature rises.
        • Diamagnetic materials are repelled by a magnetic field ; an applied magnetic field creates an induced magnetic field in them in the opposite direction, causing a repulsive force.
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        • 1
    2. Gold

      A

      A

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    3. Platinum Metallurgical and Materials Engineering student

      A is correct answer

      A is correct answer

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      • 0
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