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UPSC Prelims 1988Question 65Science & Technology

If S denotes sound energy, E denotes electrical energy, M denotes magnetic energy, the correct representation of recording and reproduction in an audio tape recorder is

Options

  1. (a)S—M—E—M—S
  2. (b)S—E—M—E—S
  3. (c)E—S—M—S
  4. (d)E—S—E—S

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