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Author Question: A long wire is known to have a radius greater than 4.0 mm and to carry a current uniformly ... (Read 105 times)

darbym82

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on: Jul 28, 2018
A long wire is known to have a radius greater than 4.0 mm and to carry a current uniformly distributed over its cross section. If the magnitude of the magnetic field is 0.285 mT at a point 4.0 mm from the axis of the wire and 0.200 mT at a point 10 mm from the axis, what is the radius of the wire?
 a. 4.6 mm
  b. 7.1 mm
  c. 5.3 mm
  d. 12 mm
  e. 10 mm

Question 2

A long, straight wire (radius = 2.0 mm) carries a current of 2.0 A distributed uniformly over a cross section perpendicular to the axis of the wire. What is the magnitude of the magnetic field at a distance of 1.0 mm from the axis of the wire?
 a. 0.40 mT
  b. 0.80 mT
  c. 0.10 mT
  d. 0.20 mT
  e. 0.75 mT


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s.meritte

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

C

Answer to Question 2

C


darbym82

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Reply 2 on: Jul 28, 2018
Wow, this really help

jamesnevil303

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Reply 3 on: Yesterday
Excellent

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