A long, straight wire carries a current I as shown in the figure. Which of the following statements is true regarding the magnetic field due to the wire at point P ?The magnitude is proportional to I but does not depend on r.The magnitude is proportional to I /r and the direction is into the page.The magnitude is proportional to I /r^2 and the direction is out of the page.The magnitude is proportional to I /r^2 and the direction is into the page.The magnitude is proportional to I /r and the direction is out of the page. P

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Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

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A long, straight wire carries a current I as shown in the figure. Which of the following statements is true regarding the magnetic field due to the wire at point P ?

The magnitude is proportional to I but does not depend on r.
The magnitude is proportional to I /r and the direction is into the page.
The magnitude is proportional to I /r^2 and the direction is out of the page.
The magnitude is proportional to I /r^2 and the direction is into the page.
The magnitude is proportional to I /r and the direction is out of the page.

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