211. Volume imperfections can be of the type of:

1. 1. Schottky’s defect

   
   
   

   2. twin

   
   
   

   3. stacking fault

   
   
   

   4. noncrystalline regions

   
   
   

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1. View Hint View Answer Discuss in Forum

   Volume imperfections can be of the type of noncrystalline regions

   Correct Option: D

   Volume imperfections can be of the type of noncrystalline regions

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212. The imperfections may be minimized by:

1. 1. thermal energy

   
   
   

   2. making metal in fibre form

   
   
   

   3. surface treatment

   
   
   

   4. All of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   The imperfections can be minimized by thermal energy.

   Correct Option: A

   The imperfections can be minimized by thermal energy.

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213. Influence of dislocations on mechanical strength of a crystal is to:

1. 1. increase it

   
   
   

   2. keep it uniform

   
   
   

   3. decrease it

   
   
   

   4. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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214. Ideal crystals have:

1. 1. no imperfections

   
   
   

   2. only screw dislocations

   
   
   

   3. real crystals

   
   
   

   4. Frenkel’s defect

   
   
   

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1. View Hint View Answer Discuss in Forum

   Ideal crystals have no imperfections.

   Correct Option: A

   Ideal crystals have no imperfections.

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215. An undesirable side effect of motional inductance of large conducting specimens is:

1. 1. skin effect

   
   
   

   2. hysteresis

   
   
   

   3. eddy currents

   
   
   

   4. dielectric loss

   
   
   

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1. View Hint View Answer Discuss in Forum

   An undesirable side effect of motional inductance of large conducting specimens is eddy currents.

   Correct Option: C

   An undesirable side effect of motional inductance of large conducting specimens is eddy currents.

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