MHT CET · Physics · Semiconductors
In the block diagram of simple rectifier circuit, from a variable a.c. voltage, constant d.c. voltage is obtained. The correct order of operation is
- A voltage regulator, diode rectifier, filter.
- B diode rectifier, voltage regulator, filter.
- C diode rectifier, filter, voltage regulator.
- D filter, voltage regulator, diode rectifier.
Answer & Solution
Correct Answer
(C) diode rectifier, filter, voltage regulator.
Step-by-step Solution
Detailed explanation
1. Diode Rectifier: This is the first stage, where the \(A C\) voltage is rectified to produce a pulsating DC voltage. The diode(s) in the rectifier allow current to flow only in one direction, converting the \(A C\) input into a unidirectional current.
2. Filter: After rectification, the output is a pulsating DC that still contains ripples. A filter (usually a capacitor or a combination of capacitors and inductors) smooths out these ripples, providing a more steady DC output.
3. Voltage Regulator: The final stage is the voltage regulator, which ensures that the DC voltage remains constant, even if the input \(A C\) voltage fluctuates or if there are variations in load. The regulator keeps the output voltage at a constant level by adjusting the current flow as needed.
Therefore, the correct order of operation is:
- Diode rectifier \(\rightarrow\) Filter \(\rightarrow\) Voltage regulator
2. Filter: After rectification, the output is a pulsating DC that still contains ripples. A filter (usually a capacitor or a combination of capacitors and inductors) smooths out these ripples, providing a more steady DC output.
3. Voltage Regulator: The final stage is the voltage regulator, which ensures that the DC voltage remains constant, even if the input \(A C\) voltage fluctuates or if there are variations in load. The regulator keeps the output voltage at a constant level by adjusting the current flow as needed.
Therefore, the correct order of operation is:
- Diode rectifier \(\rightarrow\) Filter \(\rightarrow\) Voltage regulator
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