Science, asked by meetm50, 10 months ago

an electric wire is stretched to increase its length by 25% by what percentage it resistance will be increased and what will be increase in its resistivity

Answers

Answered by sagar31usa

Answer:

The resistivity will remain constant. Since no material is added in the elongation therefore the volume of wire is constant. Hence if L is increased by 25% ie 5/4 times then the area shall decrease 4/5 times to keep volume constant. Hence the resistance shall increase by 56.25%.

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