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A wire of length 2 m and resistance 8 \(\Omega\) is stretched to double its original length, keeping the volume constant. What is the new resistance of the wire?
A wire of length 2 m and resistance 8 \(\Omega\) is stretched to double its original length, keeping the volume constant. What is the new resistance of the wire?
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When a wire is stretched with constant volume, the resistance changes by the square of the factor by which the length changes. If the length is doubled, the resistance increases by \( 2^2 = 4 \) times.
Updated On: Nov 26, 2025
- \( 16 \, \Omega \)
- \( 32 \, \Omega \)
- \( 8 \, \Omega \)
- \( 4 \, \Omega \)
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