What will be the effect on resistance if area of cross section is doubled ?
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Resistance is directly proportional to area and inversely proportional to length. Hence if we increaseresistance we get increasedarea and decreased length and vice - versa. Also Resistivity wont change if the length andarea is changed. It remains constant for all values for a given material.
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If the area is doubled then the resistance is halfed because Resistance is inversely proportional to are of Cross section.
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