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

 

3rd Left Hand Rule
Wire in a Magnetic Field

 

1) Draw magnetic Flux lines

(N to S)

2) Left Thumb - direction of current

 

3) Place four finger tips in the direction of the magnetic field

 

4) Palm shows direction of force on conductor

(Top View - Wire in a magnetic Field)

Force on wire? Into, Out of Page?

Figure 2 - Force on wire?

Up or Down?

 

                 

Figure 3 - Force on wire ? Up or Down?

 

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

 

3rd Left Hand Rule

Direct Current Electrical Motor
© Walter Fendt, November 29, 1997

 

E) Forces between current carrying wires

Same Current Direction?

Wires Attract

 

Opposite Currents

 

Wires repel

 

 

Wires, perpendicular
F = 0