Answer:

The resistance of circuit decreases, and a sudden flow of large current heats up the live wire and vapourises the metal.

Why is a spark produced that the place of short circuit? Why is the spark of white colour?

ANSWER:

• The resistance of circuit decreases, and a sudden flow of large current heats up the live wire and vapourises the metal.

• This causes spark.

• The metal of wire becomes very hot and naturally emits white light.

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