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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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chapter 28

CHAPTER 28

Sources of Magnetic Field

producing a magnetic field
Producing a magnetic field

Permanent Magnet

Current

biot savart law
Biot-SavartLaw

What if the wire isn’t straight?

infinite straight wire cont
Infinite Straight wire (Cont.)

Strategy: write everything in terms of θ

P

example addition of b fields
Example: Addition of B Fields

Find the B field at point P

force between parallel currents
Force between parallel currents

What if the currents are in opposite directions?

coil and bar magnet
COIL AND BAR MAGNET

The magnetic field produced by a coil is almost identical to that of a bar magnet.

solenoids1
Solenoids

n: Number of turns per unit length

Unit of n: m-1=turns/m

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