Transformers and Power Transmission

• transformers
  • Vs/Vp=Ns/Np
    • examples - step up, step down
  • Pin=Pout, Vin*Iin=Vout*Iout
• Implications for Power Transmission
  • example 1000W hair drier 120VAC (calculate current) (discuss AC current)
    • consider Pickering Nuclear Power Plant generating the required current @ 120 VAC and transmitting it 500 km through an Aluminum wire R=0.3 ohms/km. Calculate power loss in wire. (P=I²R)
    • consider 120 VAC step up to 500 kV. Calcualte current and Line loss and compare.
• Discussion applications of electromagnetism and inductance - magnetic storage, MRI, microphone, VAC questions.
• check out Ontario Power Generation