Intro to Magnetism

Introduction to Magnetism

1. Causes of a magnetic field ($\vec{B}$): A moving charge, unpaired electrons and preferential orientation of electrons. (The arrows represent the orientation of the electrons)

1. Important formulas:

$\vec{F_B} = q\vec{V}$ x $\vec{B} = qVB\sin\theta$

$\vec{F_B} = I\vec{l}$ x $\vec{B} = IlB\sin\theta$

1. $F_B\perp{V}\perp{B}$

2. Like poles repel and unlike poles attract

3. $\vec{B}$ lines are closed loops with no beginning or end

1. Magnetic monopoles cannot exist because the north and south pole cannot exist without each other