The load voltage is approximately constant when a Zener diode is ________________?
(A) Forward biased
(B) Unbiased
(C) Reverse biased
(D) Operating in the breakdown region
If the load current drawn by unregulated power supply increases, the d.c. output voltage _____________?
(A) Increases
(B) Decreases
(C) Stays the same
(D) None of the above
If the load current drawn by unregulated power supply increases, the d.c. output voltage______________?
(A) Increases
(B) Decreases
(C) Stays the same
(D) None of the above
In a loaded Zener regulator, which is the largest Zener current ?
(A) Series current
(B) Zener current
(C) Load current
(D) None of the above
Which of these is the best description for a Zener diode ?
(A) It is a diode
(B) It is a constant current device
(C) It is a constant-voltage device
(D) It works in the forward region
If the load resistance decreases in a Zener regulator, then Zener current ______________?
(A) Decreases
(B) Stays the same
(C) Increases
(D) None of the above
A Zener diode______________?
(A) Is a battery
(B) Acts like a battery in the breakdown region
(C) Has a barrier potential of 1 V
(D) Is forward biased
A 30 V Zener will have depletion layer width_______________ that of 10 V Zener?
(A) More than
(B) Less than
(C) Equal to
(D) None of the above
What is true about the breakdown voltage in a Zener diode ?
(A) It decreases when load current increases
(B) It destroys the diode
(C) It equals current times the resistance
(D) It is approximately constant
A 5 mA changes in Zener current produces a 50 mA change in Zener voltage. What is the Zener impedance ?
(A) 1 O
(B) 1 O
(C) 100 O
(D) 10 O