Ampere's Law (Calculus) Video Lessons

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Problem: An electric current is flowing through a long cylindrical conductor with radius a = 0.15 m. The current density J= 5.5 A/m2 uniform in the cylinder. In this problem, we consider an imaginary cylinder with radius r around the axis AB (a) Express B in terms of J and r.(b) For r = 0.5a, calculate the numerical value of B in Tesla

FREE Expert Solution

The magnetic field at r < a:

B=μ0ir2πr

(a)

B = μ0(πr2J)/(2πr) = 0rJ)/2

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Problem Details

An electric current is flowing through a long cylindrical conductor with radius a = 0.15 m. The current density J= 5.5 A/m2 uniform in the cylinder. In this problem, we consider an imaginary cylinder with radius r around the axis AB 

(a) Express B in terms of J and r.

(b) For r = 0.5a, calculate the numerical value of B in Tesla

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