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प्रश्न
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.
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उत्तर
A junction diode allows current to pass only when it is forward biased. So, if an alternating voltage is applied across a diode the current flows only in that part of the cycle when the diode is forward biased. This property is used to rectify alternating voltages and the circuit used for this purpose is called a rectifier.
Circuit Diagram
Working with input and output waveforms
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संबंधित प्रश्न
Briefly explain how the output voltage/current is unidirectional.
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 _____________ .
A 220 V A.C. supply is connected between points A and B (figure). What will be the potential difference V across the capacitor?
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.
Give two differences between a half-wave rectifier and a full-wave rectifier.
Name the device which utilizes the unilateral action of a pn diode to convert ac into dc.
