An otherwise infinite, straight wire has two concentric loops of radii a and b carrying equal currents in opposite directions as shown in figure. The magnetic field the common center is zero
![How to Calculate the Magnetic Field Generated by a Long Straight Current-Carrying Wire | Physics | Study.com How to Calculate the Magnetic Field Generated by a Long Straight Current-Carrying Wire | Physics | Study.com](https://study.com/cimages/videopreview/videopreview-full/a3xwypyxg4.jpg)
How to Calculate the Magnetic Field Generated by a Long Straight Current-Carrying Wire | Physics | Study.com
![homework and exercises - How to use Ampere's Law for a semi-infinite wire with current? - Physics Stack Exchange homework and exercises - How to use Ampere's Law for a semi-infinite wire with current? - Physics Stack Exchange](https://i.stack.imgur.com/5ofyh.png)
homework and exercises - How to use Ampere's Law for a semi-infinite wire with current? - Physics Stack Exchange
![The 1A current flows through ab infinitely on a long straight wire. The magnetic field produced at a point 1 m away from it is what? - Quora The 1A current flows through ab infinitely on a long straight wire. The magnetic field produced at a point 1 m away from it is what? - Quora](https://qph.cf2.quoracdn.net/main-qimg-88e60bdbf7bf36e4be4dafab6398c778.webp)
The 1A current flows through ab infinitely on a long straight wire. The magnetic field produced at a point 1 m away from it is what? - Quora
Physics for Science & Engineering II | Example: Magnetic field of an infinitine, straight current carrying wire
![A straight infinite current-carrying wire is bent into the form shown in the figure above. I=2A. The curve is a semicircle of radius a=70cm. What is the field at the point P? [{ A straight infinite current-carrying wire is bent into the form shown in the figure above. I=2A. The curve is a semicircle of radius a=70cm. What is the field at the point P? [{](https://homework.study.com/cimages/multimages/16/untitled9210742623645365025.jpg)