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प्रश्न
With the help of a circuit diagram, explain briefly how a p-n junction diode works as a half-wave rectifier.
उत्तर
Half-Wave rectifier: The rectifier that converts only one-half of ac into dc is called a half-wave rectifier.
Circuit diagram:
Working:
The primary coil of the transformer receives the ac input signal that needs to be rectified. A load resistance RL and a junction diode are connected in series with the secondary coil.
Point A of the secondary coil is positive and point B is at zero potential for positive ac half cycles. The junction diode is forward biassed because A is connected to the junction diode's p-region. The junction diode conducts as a result. RL is crossed to obtain the output voltage, which fluctuates in accordance with the input half cycle.
Point A is negative and point B is at zero potential for negative half cycles of ac. Since it is reverse biassed, the junction diode. As a result, there is no output across load resistance since the junction diode does not conduct.
The output variation corresponding to the input is shown below:
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संबंधित प्रश्न
Draw the circuit diagram of a full wave rectifier. Explain its working showing its input and output waveforms.
Briefly explain how the output voltage/current is unidirectional.
Draw the circuit diagram of a half wave rectifier and explain its working.
In half-wave rectification, what is the output frequency if the input frequency is 50 Hz. What is the output frequency of a full-wave rectifier for the same input frequency.
When the diode shows saturated current, dynamic place resistance is _____________ .
Fill in the blank.
The ability of a junction diode to __________ an alternating voltage is based on the fact that it allows current to pass only when it is forward biased.
Draw the circuit diagram of a full wave rectifier.
To reduce the ripples in a rectifier circuit with capacitor filter ______.
- RL should be increased.
- input frequency should be decreased.
- input frequency should be increased.
- capacitors with high capacitance should be used.
Draw the output waveform across the resistor (Figure).
Give two differences between a half-wave rectifier and a full-wave rectifier.
