OpenStax University Physics/E&M/Sources of Magnetic Fields

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(Vol. 2):    5:Electric Charges and Fields    6:Gauss's Law    7:Electric Potential    8:Capacitance    9:Current and Resistance    10:Direct-Current Circuits    11:Magnetic Forces and Fields    12:Sources of Magnetic Fields    13:Electromagnetic Induction    14:Inductance    15:Alternating-Current Circuits    16:Electromagnetic Waves


Chapter 12[edit | edit source]

Sources of Magnetic Fields[edit | edit source]

Magnetic field element (Biot-Savart Law).svg

▭ Permeability of free space T·m/A
▭ Force between parallel wires

▭ Biot–Savart law

▭ Ampère's Law:
▭ Magnetic field due to long straight wire ▭ At center of loop
▭ Inside a long thin solenoid where is the ratio of the number of turns to the solenoid's length.
▭ Inside a toroid

▭ The magnetic field inside a solenoid filled with paramagnetic material is where is the permeability

For quiz at QB/d_cp2.12[edit | edit source]

Free space permeability T·m/A
Force between parallel wires
Biot–Savart law
Ampère's Law:
Magnetic field inside solenoid with paramagnetic material = where = permeability