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Current Electricity question

2017 · 9 Apr · Shift 1 · Q60
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  5. /2017 · 9 Apr · Shift 1 · Q60

Current Electricity question

2017 · 9 Apr · Shift 1 · Q60

JEE MainPhysicsCurrent ElectricityMCQ+4 / −1
A uniform wire of length 1 and radius r has a resistance of 100 Ω\OmegaΩ. It is recast into a wire of radius r2.{r \over 2}.2r​. The resistance of new wire will be :
  1. A
    1600 Ω\OmegaΩ
  2. B
    400 Ω\OmegaΩ
  3. C
    200 Ω\OmegaΩ
  4. D
    100 Ω\OmegaΩ
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