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Author Question: A long solenoid (1500 turns/m) carries a current of 20 mA and has an inside diameter of 4.0 cm. A ... (Read 91 times)

moongchi

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on: Jul 28, 2018
A long solenoid (1500 turns/m) carries a current of 20 mA and has an inside diameter of 4.0 cm. A long wire carries a current of 2.0 A along the axis of the solenoid. What is the magnitude of the magnetic field at a point that is inside the solenoid and 1.0 cm from the wire?
 a. 78 T
  b. 55 T
  c. 48 T
  d. 68 T
  e. 2.0 T

Question 2

Determine the distance to Proxima Centauri in light-years, if it is 1.3 pc away.


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jxjsniuniu

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

b

Answer to Question 2

d(ly) = 1.3 pc  3.26 ly/1 pc = 4.3 ly


moongchi

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Reply #2 on: Jul 28, 2018
Thank you!


jxjsniuniu

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Reply #3 on: Jul 28, 2018
Always glad to help...


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