everyday science MCQ #256

The substance coated on plastic tape recorder tapes is:

everyday science MCQ #256

  1. Question 1

    Q1. The substance coated on plastic tape recorder tapes is:

    • A) Zinc oxide
    • B) Manganese oxide
    • C) Iron sulfate
    • D) Iron oxide

    Answer: Iron oxide

    Explanation: Magnetic recording tape is coated with fine particles of iron oxide (Fe₂O₃ or Fe₃O₄), which can be magnetized in patterns corresponding to audio or video signals.