46. For an SCR with turn-on time of 5 microsecond, an ideal trigger pulse should have—
    

1. 1. short rise time with pulse width = 3 μ sec

   
   
   

   2. long rise time with pulse width = 6 μ sec

   
   
   

   3. short rise time with pulse width = 6 μ sec

   
   
   

   4. long rise time with pulse width = 3 μ sec

   
   
   

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   NA

   Correct Option: B

   NA

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47. For an SCR with turn-on time of 5 microseconds, an ideal trigger pulse should have—

1. 1. short rise time with pulse width = 3 μ sec

   
   
   

   2. long rise time with pulse width = 6 μ sec

   
   
   

   3. short rise time with pulse width = 6 μ sec

   
   
   

   4. long rise time with pulse width = 3 μ sec

   
   
   

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   NA

   Correct Option: C

   NA

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48. In Fig. ideal moving iron voltmeters M₁ and M₂ will respectively read—
    
    
    

1. 1. 141·4 V, 141·4 V

   
   
   

   2. 0, 141·4 V

   
   
   

   3. 0, 200 V

   
   
   

   4. 141·4 V, 0

   
   
   

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   NA

   Correct Option: B

   NA

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49. Turn-on time of an SCR can be reduced by using a—

1. 1. rectangular pulse of high amplitude and narrow width

   
   
   

   2. rectangular pulse of low amplitude and wide width

   
   
   

   3. triangular pulse

   
   
   

   4. trapezoidal pulse

   
   
   

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   NA

   Correct Option: A

   NA

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50. In a thyristor, the magnitude of anode current will—

1. 1. increase if gate current is increased

   
   
   

   2. decrease if gate current is decreased

   
   
   

   3. increase if gate current is decreased

   
   
   

   4. not change with any variation in gate current

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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