196. A P-type semiconductor considered as a whole is:

1. 1. electrically neutral

   
   
   

   2. positively charged

   
   
   

   3. negatively charged

   
   
   

   4. None of these

   
   
   

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   P-type semiconductor considered as a whole is electrically neutral.

   Correct Option: A

   P-type semiconductor considered as a whole is electrically neutral.

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197. The highest mobility is associated with:

1. 1. holes

   
   
   

   2. electrons

   
   
   

   3. positive ion

   
   
   

   4. negative ion

   
   
   

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   The highest mobility is associated with negative ion.

   Correct Option: D

   The highest mobility is associated with negative ion.

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198. Hall effect:

1. 1. describes the behaviour of minority carriers in a semiconductor under the influence of a magnetic field

   
   
   

   2. can be used to find whether a semiconductor is of Ntype or P-type

   
   
   

   3. cannot be used to determine the concentration of carriers and their mobility

   
   
   

   4. is a phenomenon applicable to semiconductors alone

   
   
   

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   Hall effect can be sued to find whether a semiconductor is of N-type or P-type.

   Correct Option: B

   Hall effect can be sued to find whether a semiconductor is of N-type or P-type.

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199. Hall effect coefficient is:

1. 1. directly proportional to the mobility of the specimen

   
   
   

   2. directly proportional to the conductivity of the specimen

   
   
   

   3. not applicable to the semiconductors

   
   
   

   4. cannot be used to determine the mobility of the specimen

   
   
   

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   Hall effect coefficient is directly proportional to the conductivity of the specimen.

   Correct Option: A

   Hall effect coefficient is directly proportional to the conductivity of the specimen.

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200. Negative resistance of a tunnel diode:

1. 1. is maximum at the peak point

   
   
   

   2. occurs during reverse bias conditions

   
   
   

   3. exists between peak and valley points

   
   
   

   4. is maximum at valley point

   
   
   

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1. View Hint View Answer Discuss in Forum

   Negative resistance of a tunnel diode exists between peak and valley points.

   Correct Option: C

   Negative resistance of a tunnel diode exists between peak and valley points.

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