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Author Question: When the number of turns in a solenoid and its length are both doubled, the ratio of the magnitude ... (Read 117 times)

lak

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on: Jul 28, 2018
When the number of turns in a solenoid and its length are both doubled, the ratio of the magnitude of the new magnetic field inside to the magnitude of the original magnetic field inside is:
 a. 0.25
  b. 0.50
  c. 1
  d. 2
  e. 4

Question 2

A long solenoid (1 000 turns/m) carries a current of 25 mA and has an inside radius of 2.0 cm. A long wire which is parallel to and 4.0 cm from the axis of the solenoid carries a current of 6.0 A. What is the magnitude of the magnetic field at a point on the axis of the solenoid?
 a. 51 mT
  b. 61 mT
  c. 43 mT
  d. 81 mT
  e. 1.4 mT


duke02

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

C

Answer to Question 2

C


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lak

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


duke02

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


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