Advertisements
Advertisements
Question
What happens during regulation action of a Zener diode?
- The current in and voltage across the Zenor remains fixed.
- The current through the series Resistance (Rs) changes.
- The Zener resistance is constant.
- The resistance offered by the Zener changes.
Options
a and b
b and d
b and c
c and d
Solution
b and d
Explanation:
Symbolically zener diode represents this: In the forward bias, the zener diode acts as an ordinary diode. It can be used as a voltage regulator.
Zener diode as a voltage regulator
A zener diode when reverse biases offer constant voltage drop across terminals as the unregulated voltage is applied across the circuit to regulate. Then during the regulation action of a Zener diode, the current through the series of resistance Rs changes and resistance offered by the Zener changes. The current through the Zener changes but the voltage across the Zener remains constant.
APPEARS IN
RELATED QUESTIONS
Describe, with the help of a circuit diagram, the working of Zener diode as a voltage regulator.
What is Zener diode?
Draw the circuit diagram of zener diode as a voltage regulator and briefly explains its working ?
Name the device which is used as a voltage regulator. Draw the necessary circuit diagram and explain its working?
Draw the I − V characteristics of zener diode and explain briefly how reverse current suddenly increase at the breakdown voltage.
Describe briefly with the help of a circuit diagram how a zener diode works to obtain a constant dc voltage from the unregulated dc output of a rectifier ?
Voltage applied between cathode and anode of an X-ray tube is 18 kV. Calculate the minimum wavelength of the X-rays produced.
In the circuit shown in the figure, the potential barrier for Ge diode is 0.3 V and for Si diode it is 0.7 V. What is the voltage VA?
In connection with the circuit drawn below, the value of current flowing through 2 kΩ resistor is ______ × 10-4 A.
The reverse breakdown voltage of a Zener diode is 5.6 V in the given circuit.
The current Iz through the Zener is ______.
