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Author Question: A high-voltage power line 20 m above the ground carries a current of 5000 A. What is the magnetic ... (Read 52 times)

iveyjurea

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on: Jul 28, 2018
A high-voltage power line 20 m above the ground carries a current of 5000 A. What is the magnetic field due to the current directly underneath the power line? (0 = 4p  10-7 Tm/A)
 a. 14 mT
  c. 20 T
  b. 35 T
  d. 50 T

Question 2

If a long spring with spring constant k is cut into 3 equal lengths, what is the spring constant of each of the 3 shorter springs?
 a. It is still k.
  c. It is k/3.
  b. It is 3k.
  d. It is k/9.


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jessofishing

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

D

Answer to Question 2

B


iveyjurea

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Reply 2 on: Jul 28, 2018
Gracias!

xiazhe

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

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