Related Resources: Engineering Conversions Equivalent

### Electric and Magnetic Quantities Units and Conversions

Engineering Conversions and Equivalents

Electric and Magnetic Quantities Units and Conversions

Where:

Length = L
Mass = M
Time = T
Current = Q/T
Charge = Q

Electric and Magnetic Quantities Conversion of mksq Units to Gaussian Units *c = vel. of light (free space) in cm/sec ≈ 3 × 1010 Use of table:
1 coulomb = 10-1 (3 × 1010) statcoulomb = 3 × 109 statcoulomb

 QUANTITY SYMBOL SI UNIT SI EQUATION CGS UNIT CGS EQUATION CONVERSION FACTOR Magnetic induction B tesla (T) B=µ o (H+M) gauss (G) B = H+4πM 1 T = 10 4 G Magnetic field strength H ampere/ meter (A/m) H = N×I/lc ( lc - magnetic path, m) oersted (Oe) H = 0.4πN×I/lc (lc - magnetic path, cm) 1 A/m = 4π×10 -3 Oe Magnetic flux Φ weber (Wb) Φ = B×Ac (Ac - area, m 2 ) maxwell (M) Φ = B×Ac (Ac- area, cm 2 ) 1 Wb = 10 8 M Magnetization M ampere/ meter (A/m) M=m/V (m- total magnetic moment, V- volume, m 3 ) emu/cm 3 M=m/V (m- total magnetic moment, V- volume, cm 3 ) 1 A/m = 10 -3 emu / cm 3 Magnetic permeability of vacuum µ o newton/ ampere 2 µ o = 4π×10 -7 1 - 4π×10 -7 Inductance L henry L=μ o μN 2 Ac/lc (Ac- area, m 2 , lc - magnetic path, m) henry L=0.4πμN 2 Ac/lc×10 -8 (Ac-area, cm 2 , lc - magnetic path, cm) 1 Emf (voltage) V volt V=-N×dΦ/dt volt V= - 10 -8 N×dΦ/dt 1 Note: in the above equations: N- turns, I - current (in amps)