Two resistance 400ohms and 800ohms are connected in series with a battery of 6v to measure current in circuit an ammeter of 10 ohms resistance is. used what is the reading of ammeter
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When magnesium ribbon is exposed to air, it forms a layer of magnesium oxide on its surface. This layer of magnesium oxide, being a stable compound, prevents further reaction of magnesium with oxygen. Hence, it should be cleaned before burning in air to remove this layer so that the metal can be exposed to air properly.
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