The capacitance of a reverse-biased pn Junction ____ with increase of reverse voltage .

1 )  The capacitance of a reverse-biased pn Junction  ____  with increase of reverse voltage .

A )  Decrease ,

B )  Increase ,

C )  Does not Change ,

Correct answer : - A )  Decrease ,

 

2 )   _____  source can form an amplifier along with a load resistor .

A )  current -dependent Current ,

B )  voltage-dependent current ,

C )  current -dependent Voltage ,

D )  Volatge-dependent Voltage ,

Correct answer : - B )  voltage-dependent current ,

 

3 )  The small-signal models of npn and pnp transistors are  _________ .

A )  Identical ,

B )  Different ,

Correct answer : - A )  Identical ,


4 )   Under _________ , the pn junction carries a current that is exponential function of the applied voltage .

A )  forward bias ,

B )  Reverse Bias ,

C )  Equillibrium ,

D )  None of above ,

Correct answer : - A )  forward bias ,

 

5 )  Consider the diode to follow constant voltage model .  What is the value of current flowing through the resistor .


A )  2 Amperes ,

B )  1 Ampere ,

C )  0 Ampere ,

D )  Current is infinite ,

Correct answer : - B )  1 Ampere ,

 

6 )  In this circuit two real diodes are connected in parallel to each other . Green diode has half the cross-section area as that of red diode , as shown in the figure .   " Vf " is the voltage across diode when it is operating under forward bias condition . What can we say about the values of currents I1 & I2 .



Correct answer : - A )  .

 

7 )  Consider the diode to follow constant voltage model . What is the value of current flowing through the resistor .


A )  2 Amperes ,

B )  1 Ampere ,

C )  0 Ampere ,

D )  Current is infinite ,

Correct answer : - A )  2 Amperes ,


8 )  What is Vout for this circuit ?   Both diodes are ideal diodes .



A )  Option a ,

B )  Option b ,

C )  Option c ,

D )  Option d ,

Correct answer : - D )  Option d ,

 

9 )  In the Circuit , D1 and D2 are ideal diodes .    The values of  ID1 and ID2 are  _________ .


A )  Zero Each ,

B )  ID1=0, ID2=4mA ,

C )  ID1=4mA, ID2=0 ,

D )  4mA Each ,

Correct answer : - B )  ID1=0, ID2=4mA ,

 

10 )   Which of the following full-wave rectifier circuit is the correct one .

A )  Circuit 1 ,

B )  Circuit 2 ,

C )  Circuit 3 ,

D )  Circuit 4 ,

Correct answer : - B )  Circuit 2 ,

 

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