Find the magnetic field intensity at the radius of 6cm of a coaxial cable with inner and outer radii are 1.5cm and 4cm respectively. The current flowing is 2A.(a) 2.73(b) 3.5(c) 0(d) 1.25The question was posed to me during an interview.Question is taken from Magnetic Field Intensity topic in chapter Magnetostics of Electromagnetic Theory

Find the magnetic field intensity at the radius of 6cm of a coaxial ca

1.	Find the magnetic field intensity at the radius of 6cm of a coaxial cable with inner and outer radii are 1.5cm and 4cm respectively. The current flowing is 2A.(a) 2.73(b) 3.5(c) 0(d) 1.25The question was posed to me during an interview.Question is taken from Magnetic Field Intensity topic in chapter Magnetostics of Electromagnetic Theory
Answer» The correct choice is (c) 0 For explanation: The inner radius is 1.5cm and the outer radius is 4cm. It is clear that the magnetic field intensity NEEDS to be CALCULATED outside of the conductor ie, r>4cm. This will lead to zero, SINCE H outside the conductor will be zero.

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