Contents

Electromagnetic Theory
Vector Analysis
Electrostatics
Magnetostatics
Maxwell Equations
Wave Propagation
Transmission Lines
Antennas
Other Topics
Other Subjects
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Magnetic Field of Infinite Wire

H = I/(2*pi*r), concentric circles.

Mohith N
Updated: 19 March 2026
9 min read

Infinite Wire Field

Test your ability to apply the field formula for an infinite current-carrying conductor.

Question 1 of 3

Q1.An infinitely long straight wire carries a current of 10 A. What is the magnetic field intensity H at a radial distance of 5 m from the wire?