World's smallest electric motor

School blocks YouTube? Use file below

Electric Motor

2 kinds of magnets - permanent and electric

Are the outside magnets N, N or S, S or N, S?

N, S - creates strongest field

Show Me The Physics

Use file below

ElectricMotor.MP4

The repulsive force between the electric
magnets and the permanent magnets
cause the motor to spin

|Onsite|

Review

Identify these magnetic poles

[ Flash ]

Describe the shape of this field

South Left, North Right

Field is straight in the middle and curved at the top and bottom

D) Direction of the force on a wire carrying current in a magnetic field

(Top View - Wire in a magnetic Field)

Force on wire? Into, Out of Page?

Out of Page

3rd Left Hand Rule
Wire in a Magnetic Field

Why Left and not right??

1) Draw Flux lines (N to S)

2) Left Thumb - direction of current

3) Four finger tips in direction of magnetic field

4) Palm shows direction of force on conductor

Figure 2 - Force on wire?

Out or In?

Out of Page

Figure 3 - Force on wire?

Out or In?

In

Force on conductor maximum when conductor placed perpendicular to field
and zero when placed
parallel
to the field.

[ Flash ]

Direct Current Electrical Motor
November 29, 1997

"Old School Physics " - How a DC Motor Works

 Forces Between Wires

Why does the light filament wiggle?