Physics
Grade-7
Easy

Question

Which one of the following is a safety device?

  1. Ammeter
  2. Voltmeter
  3. Galvanometer
  4. Fuse

hintHint:

Fuse wire and heating effect of current

The correct answer is: Fuse


    Fuse is device which blocks the overflow of current by making the circuit incomplete, fuse wire parameters are decided based on safety factors and whenever current exceeds a particular limit, the fuse wire melts the by heating effect of current and the circuit gets incomplete.

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