Electricity

Electricity

1. Fundamental

   • Charge
     • Q = ne
   • Current
     • I = Q/t
   • Potential Difference
     • V = IR

2. Circuit

   • Series
     • R = R1 + R2
     • I = I1 + I2
     • V = V1 + V2
   • Parallel
     • R = 1 / (1/R1 + 1/R2)
     • I = I1 +I2
     • V = V1 = V2

3. EMF

   • E = I(R +r) = V + Ir

4. Electrical

   • Energy
     • E = QV
   • Power
     • P = W/t
     • P = V^2 / R
     • P = IV
     • P = I^2.R
     • Efficiency = (Output Power / Input Power) x 100%