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IMSO 2015 Science International - Theory I Question 9

IMSO Science · IMSO 2015 Science International - Theory I

Question 9

A resistance of a copper bar is proportional to its length and inversely proportional to the cross-sectional area. Which of the following has the greatest resistance? (1 point)
  1. Length 4 cm; cross-sectional area 2 cm².
  2. Length 4 cm; cross-sectional area 4 cm².
  3. Length 8 cm; cross-sectional area 2 cm².
  4. Length 8 cm; cross-sectional area 4 cm².