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प्रश्न
Draw the circuit diagram of a half wave rectifier and explain its working.
Explain, with the help of a circuit diagram, the working of a p-n junction diode as a half-wave rectifier.
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उत्तर
The circuit diagram for a half wave rectifier is shown below:
Working:
During the positive half cycle of the input a.c., the p-n junction is forward biased i.e the forward current flows from p to n and the diode offers a low resistance path to the current. Thus, we get output across-load i.e. a.c input will be obtained as d.c output.
During the negative half cycle of the input a.c., the p-n junction is reversed biased i.e the reverse current flows from n to p, the diode offers a high resistance path to the current. Thus, we get no output across-load. This principle is shown in the diagram given 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.
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 _____________ .
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.
Explain with a proper diagram how an ac signal can be converted into dc (pulsating) signal with output frequency as double than the input frequency using pn junction diode. Give its input and output waveforms.
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).
Assuming the ideal diode, draw the output waveform for the circuit given in figure. Explain the waveform.
With the help of a circuit diagram, explain briefly how a p-n junction diode works as a half-wave rectifier.
Draw a labelled circuit diagram of a full wave rectifier. Show graphically how the output voltage varies with time.
