1. Metals, hard surfaces such as wall, rocks, hard wood, etc. can reflects sound.

    Metals, hard surfaces such as wall, rocks, hard wood, etc. can reflects sound.

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    • 4
  2. (i) Voltmeter is connected in parallel, and (ii) Ammeter is always connected in series.

    (i) Voltmeter is connected in parallel, and (ii) Ammeter is always connected in series.

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    • 6