four restiors of resistance 10 ohm each are joined in series to from one combination .Four such combinations are then connected in parallel
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Explanation:
When a metal reacts with oxygen, a metal oxide forms. The general equation for this reaction is: metal + oxygen → metal oxide. Rust is a form of iron oxide and it forms slowly when iron is exposed to air. Iron can be transformed to steel (an alloy), which is more resistant to rust.
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