126. During forward blocking state, a thyristor is associated with—

1. 1. large current, low voltage

   
   
   

   2. low current, large voltage

   
   
   

   3. medium current, large voltage

   
   
   

   4. low current, medium voltage
      

   
   
   

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   NA

   Correct Option: B

   NA

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127. The forward voltage drop during SCR on-state is 1·5 V. This voltage drop—

1. 1. remains constant and is independent of load current

   
   
   

   2. increases slightly with load current

   
   
   

   3. decreases slightly with load current

   
   
   

   4. varies linearly with load current
      

   
   
   

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   NA

   Correct Option: B

   NA

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128. For normal SCRs, turn-on time is—

1. 1. less than turn-off time t_q

   
   
   

   2. more than t_q

   
   
   

   3. equal to t_q

   
   
   

   4. half of t_q
      

   
   
   

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   NA

   Correct Option: A

   NA

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129. When a thyristor gets turned on, the gate drive—

1. 1. should not be removed as it will turn-off the SCR

   
   
   

   2. may or may not be removed

   
   
   

   3. should be removed

   
   
   

   4. should be removed in order to avoid increased losses and higher junction temperature
      

   
   
   

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   NA

   Correct Option: D

   NA

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130. In a thyristor, holding current is—

1. 1. more than latching current I_L

   
   
   

   2. less than I_L

   
   
   

   3. equal to I_L

   
   
   

   4. very small

   
   
   

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   NA

   Correct Option: B

   NA

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