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Author Question: Most telephone cables are made of copper wire of either 24 or 26 gauge. If the resistance of ... (Read 85 times)

waynest

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on: Jul 28, 2018
Most telephone cables are made of copper wire of either 24 or 26 gauge. If the resistance of 24-gauge wire is 137 W/mile and the resistance of 26-gauge wire is 220 W/mile, what is the ratio of the diameter of 24-gauge wire to that of 26-gauge wire?
 a. 1.6
  b. 1.3
  c. 0.62
  d. 0.79
  e. 0.88

Question 2

A rod (length = 80 cm) with a rectangular cross section (1.5 mm  2.0 mm) has a resistance of 0.20 W. What is the resistivity of the material used to make the rod?
 a. 6.0  10-7 W  m
  b. 3.8  10-7 W  m
  c. 7.5  10-7 W  m
  d. 3.0  10-7 W  m
  e. 4.8  10-7 W  m


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aloop

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Reply #1 on: Jul 28, 2018
Answer to Question 1

B

Answer to Question 2

C


waynest

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Reply 2 on: Jul 28, 2018
YES! Correct, THANKS for helping me on my review

mochi09

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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