An increase in the length of a copper wire due to stretching is 25%, R – InterviewSolution

1.	An increase in the length of a copper wire due to stretching is 25%, R1 is its resistance before stretching and R2 is its resistance after stretching, then R1 : R2 ?
Answer» An increase in the length of a copper wire due to stretching is 25%, $R_{1}$ is its resistance before stretching and $R_{2}$ is its resistance after stretching, then $R_{1} : R_{2}$ ?

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