Flux Lines - Wire

  

Ex 2) Magnetic field around Straight Conductor (A Wire)

 

Magnetic field flux lines around the conductor are circular.


 


To find the direction of the flux lines: 

 

a) Use north pole of a compass

 

b) "First Left Hand Rule"

 

1) Palms away, left hand thumb direction of electron flow (current)

2) fingers curl in direction of magnetic field

 

 


Do the magnetic lines of flux go IN or OUT at the top?