161. Under normal operating voltages, the reverse current in a silicon diode is about:

1. 1. 100 µA

   
   
   

   2. 1 µA

   
   
   

   3. 50 µA

   
   
   

   4. 200 µA

   
   
   

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   NA

   Correct Option: B

   NA

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162. Ripple factor of a full-wave rectifier is:

1. 1. 0.24

   
   
   

   2. 0.96

   
   
   

   3. 0.48

   
   
   

   4. 0.72

   
   
   

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   NA

   Correct Option: C

   NA

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163. The bridge rectifier is not used for ........... voltage applications:

1. 1. high

   
   
   

   2. low

   
   
   

   3. medium

   
   
   

   4. very high

   
   
   

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   NA

   Correct Option: B

   NA

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164. In a full-wave rectifier, if a.c. supply frequency is 50 Hz, then a.c. ripple in the output is:

1. 1. 100 Hz

   
   
   

   2. 25 Hz

   
   
   

   3. 50 Hz

   
   
   

   4. 75 Hz

   
   
   

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   NA

   Correct Option: A

   NA

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165. In a centre-tap circuit, if voltage between one, end of secondary winding and centre-tap is 300 V peak, then P.I.V. is:

1. 1. 300 V

   
   
   

   2. 150 V

   
   
   

   3. 600 V

   
   
   

   4. 900 V

   
   
   

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   NA

   Correct Option: C

   NA

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