CHAPTER 28. Sources of Magnetic Field. Producing a magnetic field. Permanent Magnet. Current. Magnetic field due to currents. Right hand rule. View from the top. VIEW FROM THE SIDE. Biot-Savart Law. What if the wire isn’t straight?. Infinite Straight wire. P. I.
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Sources of Magnetic Field
Right hand rule
What if the wire isn’t straight?
Strategy: write everything in terms of θ
Find the B field at point P
What if the currents are in opposite directions?
The magnetic field produced by a coil is almost identical to that of a bar magnet.
n: Number of turns per unit length
Unit of n: m-1=turns/m