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An infinitely long uniform solid wire of radius a carries a uniform dc current of
density J
Q.
A hole of radius b(b < a) is now drilled along the length of the wire at a distance
d from the center of the wire as shown below.
 
The magnetic field inside the hole is
  • a)
    uniform and depends only on d
  • b)
    uniform and depends only on b
  • c)
    uniform and depends on both b and d
  • d)
    non uniform
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
An infinitely long uniform solid wire of radius a carries a uniform dc...
Assuming the cross section of the wire on x -y plane as shown in figure.
Since, the hole is drilled along the length of wire. So, it can be assumed that the
drilled portion carriers current density of −J .
Now, for the wire without hole, magnetic field intensity at point P will be given as
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Most Upvoted Answer
An infinitely long uniform solid wire of radius a carries a uniform dc...
B
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An infinitely long uniform solid wire of radius a carries a uniform dc current ofdensity JQ.A hole of radius b(b < a) is now drilled along the length of the wire at a distanced from the center of the wire as shown below.The magnetic field inside the hole isa)uniform and depends only on db)uniform and depends only on bc)uniform and depends on both b and dd)non uniformCorrect answer is option 'B'. Can you explain this answer?
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