a wire of 12 ohm resistance is stretched to double its length find out the new resistance of the wire

a wire of 12 ohm resistance is stretched to double its length find out

1.	a wire of 12 ohm resistance is stretched to double its length find out the new resistance of the wire
Answer» As we KNOW that ; Resistance = Resistivitylength/area Here we NOTE that the resistance is DIRECTLY proportional to length and inversely proportional to area of cross section .... Now a/c to question,; Length of wire is double then area is reduced to HALF... Now NEW resistance = resistivity2length/area/2 New resistance =(resistivitylength/area)4 New resistance = 4resistance

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a wire of 12 ohm resistance is stretched to double its length find out the new resistance of the wire

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