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- Given that four cylindrical objects are constructed of a conductor with a constant resistivity ; which of the four has the greatest resistance?
- A. L=4, r=1
- B. L=2, r=1
- C. L=1, r=2
- D. L=1, r=4
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- A
- The resistance of an object can be expressed by
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- Since r is constant, maximizing the fraction gives the maximum resistance. Answer A therefore gives the greatest resistance.