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The circuit element used to produce a steady dc voltage from the rectified ac voltage is called a

Question and options

The circuit element used to produce a steady dc voltage from the rectified ac voltage is called a
  1. transformer
  2. filter
  3. modulator
  4. oscillator

Answer and explanation

Correct answer: B - filter
After rectification the output is pulsating DC; a filter smooths it into a steady DC voltage. Transformers change ac voltage levels, modulators and oscillators do not smooth DC.

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