why is a layer of zinc coated over iron
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to prevent rusting of iron zinc is coated over iron and Zinc reacts with surrounding and the iron remains protected this process to control rusting of iron is called galvanization
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give reason for the following (a) if we touch electric bulb that has been kept switched on for some time it will be hot( B) for a fuse wire we should choose a wire which made easily (c) if we bring a magnetic compass near an electric circuit the needle moves (d) iron fillings which are attracted to an Electromagnet drop down when the electric current is switched off
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to prevent from rusting layer of zinc is coated over iron
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