Circuits, Formulas and Tables Electrical Engineering - Basic vocational knowledge (Institut für Berufliche Entwicklung, 201 p.)
 11. Basic symbols and formulas of electrical engineering
 (introduction...) 11.1. General direct current engineering 11.2. Magnetic field 11.3. Law of induction 11.4. Electric field 11.5. Alternating current engineering 11.6. Calculation of power

### (introduction...)

The following is valid:

 I = current intensity in A E = empressed voltage in V U = voltage, terminal voltage in V R = resistance in w L = inductivity in H w = gyro-frequency in or Hz f = frequency in or Hz C = capacity in F r = resistivity in c = unit conductance in A = conductor cross-section in mm2 d = diameter in mm P = power in W (active power) Q = reactive power in Var S = apparent power in VA W = work in Wh or Ws cos j = power factor h = efficiency = flux in A B = magnetic induction in T or or H = magnetic field strength in E = electric field strength in f = magnetic flux in Wb or Vs F = force in N v = velocity in w = number of turns t = time in s or h J K = initial temperature J W = final temperature RK = resistance at initial temperature RW = resistance at final temperature µ = temperature coefficient in p = 3,14

influence of the temperature on the resistance of the conductor