131. An SCR can be brought to forward conducting state with gate-circuit open when the applied voltage exceeds—
     

1. 1. the forward breakover voltage

   
   
   

   2. reverse breakdown voltage

   
   
   

   3. 1·5 V

   
   
   

   4. peak non-repetitive off-state voltage

   
   
   

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   NA

   Correct Option: A

   NA

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132. A thyristor, when triggered, will change from forward blocking state to conduction state if its anode to cathode voltage is equal to—

1. 1. peak repetitive off-state forward voltage

   
   
   

   2. peak working off-state forward voltage

   
   
   

   3. peak working off-state reverse voltage

   
   
   

   4. peak non-repetitive off-state forward voltage

   
   
   

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   NA

   Correct Option: B

   NA

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133. In a thyristor, anode current is made up of—

1. 1. electrons only

   
   
   

   2. electrons or holes

   
   
   

   3. electrons and holes

   
   
   

   4. holes only

   
   
   

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   NA

   Correct Option: C

   NA

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134. When cathode is positive with respect to anode in an SCR, the number of blocked p-n junctions is—

1. 1. 1

   
   
   

   2. 2

   
   
   

   3. 3

   
   
   

   4. 4

   
   
   

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   NA

   Correct Option: B

   NA

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135. When anode is positive with respect to cathode in an SCR, the number of blocked p-n junctions is—

1. 1. 1

   
   
   

   2. 2

   
   
   

   3. 3

   
   
   

   4. 4

   
   
   

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   NA

   Correct Option: A

   NA

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