66. The peak for both half cycles of the output waveform—
    
    
    

1. 1. 16 V, 4 V

   
   
   

   2. 16 V, –4 V

   
   
   

   3. –16 V, 4 V

   
   
   

   4. 12 V, 4 V

   
   
   

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1. View Hint View Answer Discuss in Forum

   For first half cycle the diode will be OFF
   So, V₀ = V_i = 16 V
   For second half cycle the diode will be ON
   So, V₀ = V_B = 4V
   Hence alternative (A) is the correct choice.

   
   

   Correct Option: A

   For first half cycle the diode will be OFF
   So, V₀ = V_i = 16 V
   For second half cycle the diode will be ON
   So, V₀ = V_B = 4V
   Hence alternative (A) is the correct choice.

   
   

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67. What best describes the circuit?
    
    
    

1. 1. Full-wave rectifier

   
   
   

   2. Half-wave rectifier

   
   
   

   3. Clipper

   
   
   

   4. Clamper

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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68. Determine the total discharge time for the capacitor in a clamper having C = 0.01 µF and R = 500 kΩ.—

1. 1. 5 ms

   
   
   

   2. 25 ms

   
   
   

   3. 2.5 ms

   
   
   

   4. 50 ms

   
   
   

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1. View Hint View Answer Discuss in Forum

   = RC = 500 × 10³ × 0.01 × 10⁶ = 5ms

   Correct Option: A

   = RC = 500 × 10³ × 0.01 × 10⁶ = 5ms

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69. Diffusion current in a pn-junction is influenced by—

1. 1. Applied voltage

   
   
   

   2. Concentration gradient

   
   
   

   3. Concentration

   
   
   

   4. All of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   Diffusion current in a p n -junction diode is influenced by concentration gradient.

   Correct Option: B

   Diffusion current in a p n -junction diode is influenced by concentration gradient.

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70. Drift current in a pn-junction is influenced by—

1. 1. Applied voltage

   
   
   

   2. Concentration gradient

   
   
   

   3. Concentration

   
   
   

   4. All of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   Drift current of a pn-junction diode is influenced by applied voltage.

   Correct Option: A

   Drift current of a pn-junction diode is influenced by applied voltage.

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