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Solid State Tes...

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  • Question 1
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    Assertion : Semiconductors are solids with conductivities in the intermediate range from \(10^{–6} – 10^4 ohm^{–1}m^{–1}\) .

    Reason : Intermediate conductivity in semiconductor is due to partially filled valence band.

  • Question 2
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    Which of the following is not true about the ionic solids?

  • Question 3
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    A ferromagnetic substance becomes a permanent magnet when it is placed in a magnetic field because  ............

  • Question 4
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    The correct order of the packing efficiency in different types of unit cells is

  • Question 5
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    Which of the following defects is also known as dislocation defect?

  • Question 6
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    In the cubic close packing, the unit cell has ...........

  • Question 7
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    Which of the following represents correct order of conductivity in solids?

  • Question 8
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    Which of the following oxides behaves as conductor or insulator depending upon temperature?

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