If a wire is stretched to twice its original length without changing its volume, its new resistance becomes
Options
- A. R/2
- B. 2R
- C. 4R
- D. R/4
- E. None of the above
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Correct Answer (Detailed Explanation is Below)
C. 4R
Detailed Explanation
Constant volume gives A becoming A/2 when length becomes 2L. Thus R' = rho(2L)/(A/2) = 4R.Share On
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BPSC TRE 4 General Science practice set 1