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Author Question: A magnetic field exists in a current-carrying coil of wire A) if it contains a piece of iron. B) ... (Read 31 times)

Yi-Chen

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on: Jul 29, 2018
A magnetic field exists in a current-carrying coil of wire
 
  A) if it contains a piece of iron.
  B) with or without a contained piece of iron.
  C) only if the current changes.

Question 2

The magnetic field strength inside a current-carrying coil will be greater if the coil encloses
 
  A) a vacuum.
  B) a wooden rod.
  C) a glass rod.
  D) an iron rod.
  E) none of the above


izzat

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Reply #1 on: Jul 29, 2018
Answer to Question 1

Answer: B

Answer to Question 2

Answer: D


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