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the resistance of wire having length X M is R OHEM if i
streched the wire to dubble length what will be the
resitance
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Answer Posted / anil singh
As given R1 = L/A ohms
Lenth of cable = L Meter
and Cross Section Area supposed = A sqm
if the same streached to double length
now length of cable = 2L Meters
and Cross section area = A/2
Hence new Resistance of the wire will be R2=2L/(A/2)
R2 = 4 L/A = 4 R1
i.e. four times of earlier
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