Advertisements
Advertisements
प्रश्न
Draw the circuit diagram of zener diode as a voltage regulator and briefly explains its working ?
उत्तर
Zener diode as voltage regulator
-
After the break down voltage, a small change in the voltage across the zener diode produces a large change in the current through the circuit.
-
If the voltage is increased beyond the zener voltage, then the resistance of the zener diode drops considerably.
-
A zener diode and a resistor are connected to a fluctuating DC supply such that the zener diode is reverse biased.
- When the voltage across the diode tends to increase, the current through the diode rises out of proportion and causes a sufficient increase in voltage drop across the resistor. Therefore, the O/P voltage lowers back to normal.
संबंधित प्रश्न
What is Zener diode?
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?
Electronic motors operating at low voltages tend to burn out because
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.
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 ______.
