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Question
Constant DC voltage is required from a variable AC voltage. Which of the following is correct order of operation?
Constant DC voltage is required from a variable AC voltage. Which of the following is correct order of operation?
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Solution
The correct option is B Rectifier, Filter, Regulator
To convert AC to DC, a full wave rectifier is required. The output of the full wave rectifier will be positive cycles of the applied input AC voltage. To convert the positive cycles to ripples, a RC filter will be required. The output of the combination of the two circuits will be ripples as shown in the attached figure. After this, to get a steady value of DC, we will require a voltage regulator (can be built with the help of a zener diode) so that the output remains constant.
To convert AC to DC, a full wave rectifier is required. The output of the full wave rectifier will be positive cycles of the applied input AC voltage. To convert the positive cycles to ripples, a RC filter will be required. The output of the combination of the two circuits will be ripples as shown in the attached figure. After this, to get a steady value of DC, we will require a voltage regulator (can be built with the help of a zener diode) so that the output remains constant.
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