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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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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​

User AlexMok
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8.0k points

1 Answer

4 votes
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
User Xavier Shay
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