Zener Diode as Voltage Stabilizer
Trending Questions
Q. A zener diode of power rating \(2~\text W\) is to be used as a voltage regulator. If the zener diode has a breakdown of \(10~\text V\) and it has to regulate voltage fluctuated between \(6~\text V\) and \(14~\text V, \) the value of \(R_{S}\) for safe operation should be ________\(\Omega .\)

Ry —AMW—T————o Unregulate Regulated voltage voltage o

Ry —AMW—T————o Unregulate Regulated voltage voltage o
Q. The avalanche breakdown in p-n junction is due to
- shift of Fermi level.
- high impurity concentration.
- widening of forbidden gap.
- cumulative effect of conduction band electron.
Q. Which of the following is/are true regarding breakdown voltage of Zener diode?
- The holes in the n-side and the conduction electrons in the p-side are accelerated due to the reverse bias voltage.
- If the reverse bias voltage across a p-n junction diode is increased, at a particular voltage the reverse current suddenly decreases to a large value
- The voltage at which the rate of creation of hole-electron pairs is increased leading to the increased current is called avalanche breakdown
- None of the above
Q. What happens during regulation action of Zener diode?
- The current in and voltage across the Zener remains fixed
- The current through the series Resistance (Rs) changes
- The Zener resistance is constant
- The resistance offered by the Zener diode changes
Q. Zener diode is used as ......................
Q. How is Zener diode used as voltage regulator?
Q. A zener diode can be used as
- oscillator .
- voltage regulator.
- rectifier.
- transformer.
Q. The current flowing through the zener diode in figure is:


- 20mA
- 25mA
- 15mA
- 5mA
Q. What is the value of output voltage v0 in the circuit shown in the figure


- 6V
- 15V
- 20V
- 26V
Q. If, a Zener diode (Vz=5V and Iz=10mA) is connected in series with a resistance and 20 V is applied across the combination, then the maximum resistance one can use without spoiling zener action is
- 20 kΩ
- 15 kΩ
- 10 kΩ
- 1.5 kΩ