This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A high-voltage power line 20 m above the ground carries a current of 5000 A. What is the magnetic ... (Read 61 times)

iveyjurea

  • Hero Member
  • *****
  • Posts: 555
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.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

jessofishing

  • Sr. Member
  • ****
  • Posts: 329
Reply #1 on: Jul 28, 2018
Answer to Question 1

D

Answer to Question 2

B


iveyjurea

  • Member
  • Posts: 555
Reply 2 on: Jul 28, 2018
Thanks for the timely response, appreciate it

sailorcrescent

  • Member
  • Posts: 334
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

In 1864, the first barbiturate (barbituric acid) was synthesized.

Did you know?

There are major differences in the metabolism of morphine and the illegal drug heroin. Morphine mostly produces its CNS effects through m-receptors, and at k- and d-receptors. Heroin has a slight affinity for opiate receptors. Most of its actions are due to metabolism to active metabolites (6-acetylmorphine, morphine, and morphine-6-glucuronide).

Did you know?

Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

Did you know?

Although the Roman numeral for the number 4 has always been taught to have been "IV," according to historians, the ancient Romans probably used "IIII" most of the time. This is partially backed up by the fact that early grandfather clocks displayed IIII for the number 4 instead of IV. Early clockmakers apparently thought that the IIII balanced out the VIII (used for the number 8) on the clock face and that it just looked better.

Did you know?

More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.

A very high-resolution texture of the planet Mars A very high-resolution texture of the planet Mars
Surface magnetic field of SU Aur (a young star of T Tauri type), reconstructed by means of Zeeman-Do Surface magnetic field of SU Aur (a young star of T Tauri type), reconstructed by means of Zeeman-Do
Acid Rain and Power Plant Emissions Acid Rain and Power Plant Emissions
An AC voltage is produced by a magnetic sensor. Most sensors should produce at least 0.1 volt AC ... An AC voltage is produced by a magnetic sensor. Most sensors should produce at least 0.1 volt AC ...
Permafrost: High albedo, reflects as much as 90% of the Sun’s energy Permafrost: High albedo, reflects as much as 90% of the Sun’s energy
Nuclear power Nuclear power
Video: Stroke volume - contractility definition

For a complete list of videos, visit our video library