456. In a full-wave rectifier, the current in each of the diodes flows for—

1. 1. The complete cycle of the input signal

   
   
   

   2. Half cycle of the input signal

   
   
   

   3. Less than half cycle of the input signal

   
   
   

   4. Zero time

   
   
   

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1. View Hint View Answer Discuss in Forum

   There will be no change in the maximum voltage when the diode is reverse biased.

   Correct Option: A

   There will be no change in the maximum voltage when the diode is reverse biased.

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457. In regard to the charge control model—
     

1. 1. The relation is I, Q and is similar to V and I in the VI model

   
   
   

   2. The Q, I relation is linear

   
   
   

   3. Relates majority carriers and their life-time

   
   
   

   4. The Q and I have an exponential relation

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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458. The cut-in voltage V_r is—

1. 1. The same as the barrier potential

   
   
   

   2. The same for germanium and silicon

   
   
   

   3. The forward voltage below which the current is very small

   
   
   

   4. In the region of reverse bias

   
   
   

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1. View Hint View Answer Discuss in Forum

   The cut-in voltage is the forward voltage below which the current is very small.

   Correct Option: C

   The cut-in voltage is the forward voltage below which the current is very small.

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459. The transition capacitance C_T is related to the reverse bias | V_r | of a step graded pn junction by—
     

1. 1. C_T ∝ | V_r |

   
   
   

   2. C_T ∝ | V_r |^1/2

   
   
   

   3. C_T ∝ | V_B + V_r |^–1/2

   
   
   

   4. C_T ∝ | V_r |²

   
   
   

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1. View Hint View Answer Discuss in Forum

   CT = C0		1		1 / 2
   		VB + VT

   
   or C_T ∝ |V_B + V_r| ^–1/2

   Correct Option: C

   CT = C0		1		1 / 2
   		VB + VT

   
   or C_T ∝ |V_B + V_r| ^–1/2

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460. In a half-wave rectifier, the load current flows for—
     

1. 1. The complete cycle of the input signal

   
   
   

   2. Only of the positive half-cycle of the input signal

   
   
   

   3. Less than half cycle of the input signal

   
   
   

   4. Zero time

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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