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A uniform copper wire of mass 2.23 xx10...

A uniform copper wire of mass `2.23 xx10^(-3)` kg carries a current of 1 A when 1.7 V is applied across it. Calculate the length and the area of cross section, if the wire is uniformaly stretched to double its length, calculate the new resistance. Density of copper is `8.92xx10^3 kgm^(-3)` and resistivity is `1.7xx10^(-8) Omega m.`

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To solve the problem step by step, we will calculate the length and area of the copper wire, and then determine the new resistance after the wire is stretched to double its length. ### Step 1: Calculate the Volume of the Wire The mass \( m \) of the wire is given as \( 2.23 \times 10^{-3} \) kg, and the density \( D \) of copper is \( 8.92 \times 10^{3} \) kg/m³. Using the formula for mass: \[ m = V \cdot D ...
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