Unit+4

**UNIT 4** ** Here are some (hopefully) helpful links, notes and videos for Unit 3. Have Phun! **

[|Past Examination] [|Practice Examinations - iTute] Earth is a giant magnetSouth pole is to the north end of the magnet and the north pole is the south end. Like poles repel, Unlike attract.** The Right Hand Grip rule is used to find the Direction of the magnetic field (B) as well as the Current (I) If you were to open your hand flat so your fingers are in the direction of the field and the thumb in the dirction of the current then the FORCE (F) is in the direction of your Palm Also Called the Slap Rule.
 * __Magnets and Electricity __All Magnet no matter how small are Dipolar, Have 2 pole. if broken in half 2 new pole will be created on the breaks.
 * The magntic Field is a vector

The Force of a wire can Be Found by F = nILB Or Force on the wire is Equal to the No. of wires (n) By the Current (I) by the Lenght of the Wire (L) by the Magnetic Field (B). It can Also be written as F=NILBsinof the angle

Earth is Approxmently 5x10 to the power of -5T ( T is Teslas) ( 1 Tesla = 1 Newton Per Amp meter)** __   **Solenoids ( I need help here)** **These**  **  are 2 solenoids  ** **Solenoids are just big coils of wire that work the same as a bar magnet. SOME PLEASE ADD MORE DETAIL :0**    __ The magnetic force on an electric current is due to the force on the moving charges**
 * Forces on a moving charge can be found by F= qvB the Force = the Charge (q) by the Voltage supplyed (v) by the Magnetic feild. it is moving at right angles to the motion of the field.

there is a turning force present on a dc motor as it turns under the force it will stop as one force is up and the other is down and not moving. the Spilt ring or Commutator reveres the current at this point and it starts turning again this happens continuosly ** **PART ONE
 * DC Motors ( Agian Help where you Can Please)

** **Part 2 with a Commutator**

I NEED HELP I WILL BE CHEEKING HERE CONSTINTLY SO I NEED YOUR HELP TO FIX UP ALL MISTAKES OR LACK OF INFO. THANKS GUYS!!!

= **__ ELECTRIC POWER INTERACTIONS OF LIGHT AND MATTER SYNCHROTRON __** =