Electrical Fundamentals

Electrical Fundamentals

1. V = (I)(R)

   • I = V/R
     • R = V/I

2. P = IV

   • P = (I^2)(R)
     • P = V^2/R

3. Voltage & Current Divider

   • Vs(Rx/Rt)
     • Ix = It(Rt/Rx)

4. Capacitor

   • Q = CV
     • C = Q/V
       • V = Q/C

5. Capacitors in Series

   • Ct = 1/(1/C1 + 1/C2 = 1/Cn)

6. Capacitors in Parallel

   • Ct = C1 + C2 + Cn

7. Capacitor Voltage Divider

   • Vx = Vs(Ct/Cx)

8. Capacitance

   • A Er(8.85 x 10^-12)/d

9. RL Time Constant

   • T = L/R

10. Inductance

    • N^2 m A/L

11. Inductors in Parallel

    • 1/(1/L1 + 1/L2 + 1/Ln)

12. Inductors in Series

    • L1 + L2 + Ln