ECE 121Electromagnetic System and Energy Conservation1/20/11Tranformers

Tesla

Pg 7 Power vs EnergyWork when performed, energy is usedPower energy over time Torque applying force through an angle Pg 8 conversion to horse power1.4 Magnetic Field- a current carrying wire produces a magnetic field in the area around it- a time changing magnetic field induces a voltage in a coil of wire if it passes through that coil. (this is the basis of transformer action) Alternating Current- a current carrying wire in the presence of a magnetic field has a force induced on it. (this is the basis of motor action)- a moving wire in the presence of a magnetic field has a voltage induced in it. (this is the basis of generator action)- prime movers: turbine, wind, tidalAmperes LawRight grip rule(1-18)(1-19)(1-20)(1-21)H = amp*turns/mU = H/mB =wb/ uNi/l(1-22)(1-23)Example 1.2 typo error replace with (0.0012m^2) not (0.002m^2)