Question

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Answer 1

Answer:

Physical changes are changes affecting the form of a chemical substance, but not its chemical composition. Physical changes are used to separate mixtures into their component compounds, but can not usually be used to separate compounds into chemical elements or simpler compounds.

MCBs or Miniature Circuit Breakers work as automatic electrical switches that are designed to protect an electrical circuit from damage. These are time delay tripping devices controlled by the magnitude of overcurrent. ... The device opens when excessive current flows through the circuit