ICS Part 2 Physics Chapter 17 Short Questions Preparation


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Short Questions Preparation

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Physics - ICS Part 2 Physics Chapter 17 Short Questions Preparation

Question # 1

How n type semiconductors are formed?

  • Ans 1: When a silicon crystal is doped with a pentavalent element,e.g arsenic,antimony or phosphorus etc.four valence electrons of the impurity atom form covalent bond with the four neighbouring Si atoms,while the fifth valence electrons provide a free electron in the crystal.Such a doped semiconductor is called n type semiconductor.
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ICS Part 2 Physics Chapter 17 Short Questions Preparation - Set 1

Question # 1

How n type semiconductors are formed?

  • Ans 1: When a silicon crystal is doped with a pentavalent element,e.g arsenic,antimony or phosphorus etc.four valence electrons of the impurity atom form covalent bond with the four neighbouring Si atoms,while the fifth valence electrons provide a free electron in the crystal.Such a doped semiconductor is called n type semiconductor.
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ICS Part 2 Physics Chapter 17 Short Questions Preparation - Set 2

Question # 1

Differentiate between amorphous and polymeric solid.

  • Ans 1: Amorphous solid,any non-crystalline solid in which the atoms and molecules are not organized in a definite lattice pattern,such solid include glass ,plastic and gel.
  • Ans 2: Polymer are said to be more or less solid materials with a structure that is intermediate between order and disorder.They can be classified as partially or poorly crystalline solids.
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ICS Part 2 Physics Chapter 17 Short Questions Preparation - Set 3

Question # 1

Define UTS of a material.

  • Ans 1: The maximum stress that a material can withstand is called ultimate tensile stress.
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ICS Part 2 Physics Chapter 17 Short Questions Preparation - Set 4

Question # 1

Differentiate between ductile and brittle substance,Give their examples.

  • Ans 1: Ductile substance:Substance that undergo plastic deformation unit they break are called ductile substance.Lead copper,and wrought iron are ductile.
    Brittle substance: The substance which break just after the elastic limit reached are known as brittle substance.Glass and high carbon steel are brittle.
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ICS Part 2 Physics Chapter 17 Short Questions Preparation

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