Multiple choice

The tape in a cassette which is plyed in a tape recorder is coated with

  1. copper sulphate

  2. ferromagnetic powder

  3. silica

  4. zinc suphide
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Cassette tapes use magnetic tape coated with ferromagnetic powder (such as ferric oxide or chromium dioxide). This coating allows sound to be recorded and played back through electromagnetic encoding and pickup by the tape recorder head.

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