Q.1     Rectification efficiency of a full wave rectifier without filter is nearly equal to?
A)    51 %
B)    61 %
C)    71 %
D)    81 %
Ans : D

Q.2    When the temperature of a doped semiconductor is increased, its conductivity?
A)    Decreases
B)    Increases
C)    Does not change
D)    Increases or decreases depending on whether it is p or n-type
Ans : B

Q.3    If the peak value of the input voltage to a half wave rectifier is 28.28 volts and no filter is use, the maximum dc voltage across the load will be?
A)    20.2 V
B)    15 V
C)    9 V
D)    14.14 V
Ans : C

Q.4    In a full-wave rectifier without filter, the ripple factor is?
A)    0.482
B)    1.21
C)    1.79
D)    2.05
Ans : A

Q.5    The breakdown mechanism in a lightly doped p-n junction under reverse biased condition is called?
A)    Avalanche breakdown
B)    Zener breakdown
C)    Breakdown by tunneling
D)    High voltage breakdown
Ans : A

Sources