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close this bookCircuits, Formulas and Tables Electrical Engineering - Basic vocational knowledge (Institut für Berufliche Entwicklung, 201 p.)
close this folder11. Basic symbols and formulas of electrical engineering
View the document(introduction...)
View the document11.1. General direct current engineering
View the document11.2. Magnetic field
View the document11.3. Law of induction
View the document11.4. Electric field
View the document11.5. Alternating current engineering
View the document11.6. Calculation of power

11.2. Magnetic field


magnetic flux:

magnetic resistance:

1 = magnetically effective length in m

A = flux passage area in m2

comparative figure ur for air = 1, 000 000 4

magnetic permeability

relative permeability

mr - comparative figure

induction constant

magnetic field strength

magnetic induction

B = m · H = mo · mr · H