A wire has resistance R. If its cross-sectional area is doubled while its length remains unchanged, its new resistance will be
Options
- A. R/4
- B. R/2
- C. 2R
- D. R
- E. None of the above
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Correct Answer (Detailed Explanation is Below)
B. R/2
Detailed Explanation
Since R = rho L/A, doubling the cross-sectional area makes resistance half: R/2.Share On
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BPSC TRE 4 General Science practice set 1