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  1. 1. Science – 11CELECTROMAGNETIM<br />Sir Michael Jerome M. Encina<br />
  2. 2. What is Electromagnetism?<br />A branch of study where Electricity and Magnetism are combined.<br />Products of Electromagnetism:<br />-Generator = Motion Magnetism Electricity<br />Change(I) Change(B)<br />-Electric Motor =Electricity MagnetismMotion<br />Change(B) Change(I)<br />-Any Generator can be turned into an Electric Motor and VICE VERSA.<br />
  3. 3. Principle: Electro-Magnetic Field<br /> A changing magnetic field can induce a changing electric current. Example: Generator<br />Example: Wrap a wire (gold works best) around and iron nail. The coil acts as a current carrier. Once the current enters the spiral it will have an ever changing electric current. ~ I = B ~<br />*Magnetism: Movement of charges. All bodies are made up of atoms which are constantly moving so all matter has a magnetic property. <br />--Some stronger than others.<br />
  4. 4. Electromagnetism<br />Distance affects magnetic force: The greater the distance the less the force. VICE VERSA.<br />DYNAMO<br />-Made out of a loop surrounded by magnets, common for Generator. When an electric current is added to DYNAMO = Electric Motor.<br />
  5. 5. TRANSFORMER<br /> Voltage Transformer<br />Physical Description<br />Composed of two coils sharing a single IRON core.<br />Use:<br />A device that increase or decreases voltage.<br />Iron Core<br />Primary/ Secondary Coil<br />Bulb<br />
  6. 6. Transformer Chart<br />Vp/ Vs = Np/Ns<br />
  7. 7. ElectroMagnetic Induction<br />Recall:<br />
  8. 8. Electromagnetic Induction<br />Changing magnetic field will create a changing electric current which means you will have an ALTERNATING CURRENT. <br />Vice Versa.<br />Change B  Change I } Generator<br />Change I  Change B } Electric Motor<br />
  9. 9. Generator<br />DYNAMO<br />Gears<br />Bulb<br />Manually turning the lever will cause the bulb to light up!<br />Positive and Negative Wires<br />Lever<br />
  10. 10. DYNAMO<br />Attaching the positive and negative wires will cause the lever to turn using the electric power from the battery!<br />Gears<br />Battery<br />Positive and Negative Wires<br />Lever<br />Electric Motor<br />
  11. 11. Manually Turning a Turbine<br />DYNAMO<br />Positive and Negative wires.<br />Gears<br />Turbine<br />Levers<br />Manually turning the lever will cause the turbine to spin<br />
  12. 12. Waves and Optics<br />Sir Michael Jerome M. Encina<br />
  13. 13. Waves and Optics<br />*Medium <br />-Any material used.<br />- A series of disturbances<br />Mechanical – Requires Medium<br />-Water waves and Sound<br />Formula <br />For<br />Frequency<br />And <br />Period<br />T= 1/f<br />F=1/T<br /><ul><li>Electromagnetic waves – W/o Medium</li></ul>- Micro waves and Light waves.<br />Pink and Blue lines = Waves<br />
  14. 14. Waves According to Form.<br />Horizontal line = LINE OF EQUILIBRIUM<br />-where particals are found at rest.<br />Crest – Highest point on a wave.<br />Wavelength<br />Trough – lowest point on wave<br />Amplitude<br />T(period) – Time to finish one cycle.<br />F(frequency) – Number of cycles. <br />λ<br />- Lamda<br />Transverse wave<br />A wave created from particles moving perpendicular from line of equilibrium<br />
  15. 15. FM AM<br />Frequency Modulation<br />Amplitude Modulation<br />1 hz<br />2 hz<br />5hz<br />