41. In given fig., if C = 8 _μF and L = 0·2 mH, the peak current handled by diode is—
    
    
    
    

1. 1. 40 A
      

   
   
   

   2. 50 A
      

   
   
   

   3. 10 A
      

   
   
   

   4. 30 A

   
   
   

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   NA

   Correct Option: B

   NA

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42. In given fig. PIV required for the diode is:
    
    
    
    

1. 1. 300 V
      

   
   
   

   2. 100 V
      

   
   
   

   3. 200 V
      

   
   
   

   4. 400 V

   
   
   

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   NA

   Correct Option: D

   NA

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43. In given fig., suppose capacitor C is charged to 50V with lower plate positive. Switch S is closed at t = 0. Current through the diode at t = 0 and final voltage across C are respectively:
    
    
    
    

1. 1. 25 A, 250 A
      

   
   
   

   2. 25 A, 200 V
      

   
   
   

   3. 20 A, 200 V
      

   
   
   

   4. 15 A, 150 V

   
   
   

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   NA

   Correct Option: B

   NA

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44. Analysis of voltage waveform of a single phase bridge converter shows that it contains X% of 6th harmonics. The 6th harmonic content of the voltage waveform of a 3-φ bridge converter would be:
    

1. 1. Less than X% due to an increase in the number of pulses

   
   
   

   2. Equal to X%, the same as that of the single phase converter

   
   
   

   3. Greater than X% due to changes in o/p and i/p voltages of the converter

   
   
   

   4. Difficult to predict as the analysis of converters is not governed by any generalised theory

   
   
   

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   NA

   Correct Option: A

   NA

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45. Consider the following statements: The overlap angle of a phase controlled converter would increase on increasing the—
    1. Supply voltage
    2. Supply frequency
    3. Load current
    4. Source inductance Of these statements which are correct:
    

1. 1. 1, 2, 3
      

   
   
   

   2. 2, 3, 4
      

   
   
   

   3. 1, 2, 4
      

   
   
   

   4. 1, 3, 4

   
   
   

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   NA

   Correct Option: C

   NA

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