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27 November, 11:28

The electrical resistance of aire is directly proportional to its length. If a 45-foot long wire has a resistance of 9 ohm (s), find the resistance of a 75-foot long wire.

What is the resistance?

ohms

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Answers (1)
  1. 27 November, 15:06
    0
    The resistance is proportional to the length.

    You know that 45/9=5

    So the ratio (proportionality) is 5.

    So, for a 75 ft wire, the resistance is 75/5 = 15 ohms
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