Physics

Attachments:

• physics

1. Magnets

   Annotations:

   • Magnets have a north pole and a south pole

   Attachments:

   • Magnets
   1. Same Poles Repel

      Annotations:

      • For example  S and S repel  N and N repel 
   2. Different poles attract

      Annotations:

      • For example  N and S attract
   3. The Field lines travel from N to the S

      Annotations:

      • The field lines go out North and go in South
2. Electromagnatism

   Attachments:

   • Electromagnetism
   1. The metals which can have magnetic properties

      Annotations:

      • Magnets are magnetic when the domains inside the domains inside then line up
      1. Iron
      2. Steel
         1. Permanent magnet
      3. Cobalt
      4. Nickel
   2. Making Electromagnets

      Annotations:

      • Need: -Iron core -Coil of wire -electricity How to increase the strength of a electromagnet: - increase the current -increase the amount of Fe  -increase the number of coils
3. Waves
4. Equations

   Annotations:

   • Force (N) = magnetic flux density (Tesla) x current (Amps) x length (m) F = BIL Charge = Current x Time  Q = It
   1. Symbols

      Annotations:

      • Force = F Magnetic density = B Current = I Length = L Charge = Q Time = t  Potential difference = V Energy transferred = E Resistance = R Frequency = fWavelength = 
   2. Units

      Annotations:

      • Charge = Coulomb (C) Current = Amp (A) Time = Second (s) Potential difference = Volts (V) Energy transferred = Joules (J) Resistance = Ohms( Wavelength = (m) Frequency = (Hz) Speed = (m/s) Magnetic flux density = Tesla  Force = Newtons (N) Length = meters (m)