Magnetic Field

Magnetic Force

This force’s direction is always perpendicular to both the direction of the moving charged particle and the direction of the applied magnetic field.

For an isolated charge, this force is the dominant force governing the charge’s motion

F = qv × B

Equation for magnetic force on a charge

Magnetic field

Gets defined in terms of force on a charged particle moving in a magnetic field

F = qvBsin(θ)

Equation for the magnitude of the magnetic force on a charge.

θ

Symbol in the “Magnitude of the Magnetic force on a charge” equation that represents the angle between the velocity and magnetic field

tesla (T)

The S.I. Unit for the magnetic field strength

1 T = (1 N)/(A•m)

Define Tesla

gauss (G)

A smaller unit that gets used to measure the magnetic field strength

1 G = 10^-4 T

1 gauss is how many teslas?

2 T

The approximate Magnetic fields of the strongest permanent magnet.

10 T

The approximate Magnetic fields of the superconducting electromagnets.

5*10^-5 T or 0.5 G

Earth’s magnetic field on its surface

static charges

There is no magnetic force on…

stationary

When the charges are _________, their electric fields do not affect magnets.

Magnetic field that exerts forces on other magnets only gets produced when the charges move.

velocity and magnetic field are parallel to each other.

Magnetic Force on the moving charge is zero when…

Areal density

No. of lines per unit area perpendicular to the magnetic field lines.

Magnetic field strength is exactly proportional to this feature.

North Pole to South Pole

Magnetic field lines are directed from

Magnetic Field Strength

Is proportional to the closeness of the magnetic field lines.