Question # 1

Which type of impurity is to be added to a pure semi conductor crystal to provide holes.

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Monovalent

Trivalent

Tetravalent

Pentavalent

Which one of the following is crystalline solid.

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Zirconia

Glassy solid

Natural rubber

Poly strene

Which one is pentavalent impurity

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Boron

Gallium

Antimony

Indium

The critical temperature of Aluminum is.

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3.72 K

1.18 K

7.2 K

8.2 K

Which one of the following is polymeric solids

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Glass

Nylon

Copper

Zinc

Semiconductors have conductivity of order:

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10^-8 to 10^-6 (Ωm)^-1

10^-6 to 10^-4 (Ωm)^-1

10² to 10⁵ (Ωm)^-1

10^-5 to 10^-7 (Ωm)^-1

Conductors have conductivities of order:

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10³(Ωm)-1

10⁷(Ωm)^-1

10⁷Ωm^-1

10^-6Ω

Recently superconductor discovered is at temperature.

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110K

143K

16.3K

119K

The SI unit of Stress is:

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Nm

Nm²

NM^-2

Nm³

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Physics Fsc Part 2 Chapter 6 Online Test MCQs With Answers

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