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Chemical Effects of Electric Current
In case of a fire, before the firemen use the water hoses, they shut off the main electrical supply for the area. Explain why they do this.
In case of a fire, before the firemen use the water hoses, they shut off the main electrical supply for the area because water is a conductor of electricity. If the electrical supply for the area is not shut off and water is poured over electrical appliances, then electricity may pass through water and harm the firemen.
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