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Physics · May / June 2017 · Paper 11 · Question 38

5054Resistance

A cylinder of conducting material has resistance R. A second cylinder of the same material is twice as long but has half the cross-sectional area. What is the resistance of the second cylinder?

  1. AR/2
  2. BR
  3. C2R
  4. D4R

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Correct answer: D. 4R

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