Figure 29-78 that appears below shows a cross section of a long cylindrical cond

Question

Figure 29-78 that appears below shows a cross section of a long cylindrical conductor with a radius a = 4.96 cm, containing a long, cylindrical hole with a radius b = 1.06 cm. The central axes of the cylinder annd hole are parallel and are a distance d=2.00 cm apart; current i = 5.86 A is uniformly distributed over the tinted area. What is the magnitude of the magnetic field at the center of the hole? Figure 29-78 that appears below shows a cross section of a long cylindrical conductor with a radius a = 4.96 cm, containing a long, cylindrical hole with a radius b = 1.06 cm. The central axes of the cylinder annd hole are parallel and are a distance d=2.00 cm apart; current i = 5.86 A is uniformly distributed over the tinted area. What is the magnitude of the magnetic field at the center of the hole?

Explanation / Answer

At the center of the hole, this field is zero and the field there is exactly the same as it

would be if the hole were filled. Place r1 = d in the expression for B1 and obtain

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