a cyllindrical wire is stretched to increase its length by 10 percentage . calculate the percentage change in its resistance?
Asked by babita bhatt | 18th Feb, 2014, 09:57: PM
Expert Answer:
Let ρ be the resistivity of the material of the wire and R1 and R2 are the resistances of the wire in the two cases.
Initial length = l1
Initial cross-section = A1
Final length = l2
Final cross-section = A2
Let ρ be the resistivity of the material of the wire and R1 and R2 are the resistances of the wire in the two cases.
Initial length = l1
Initial cross-section = A1
Final length = l2
Final cross-section = A2
Answered by | 19th Feb, 2014, 11:50: AM
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