A.C. D.C. Theory

A.C. D.C. Theory

1. A.C Theory

2. D.C Theory

   • Ohms law
     • V=Voltage
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3. D.C.

   • ohms law
     • V=voltage I=Current R=Resistance
   • Series circuit
     • R1+R2+R3=RT
   • Parallel circuit
     • RT=R1xR2/R1+R2

4. A.C.

   • EMF
     • e=blv
     • V=Velocity of conductor in meters/sec(m/s)
     • I=length of conductor in meters(M)
     • b=magnetic flux in tesla (t)
     • e=induced emf in volts
   • A.C. Distribution
     • Star connection
       • Vl=(Square rough)3xVp & Il=Ip
     • Delta connection
       • Vl=Vp & Il=(Square rough) 3xIp

5. Transformers

   • Electro-magnetic induction
     • Magnetic firld
       • change current
         • simple coil