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RELATED SI UNITS

SI units related to magnetism

 

SI electromagnetism units

v • d • e

Symbol

Name of Quantity

Derived Units

Unit

Base Units

I

Electric current

ampere (SI base unit)

A

A (= W/V = C/s)

q

Electric charge, Quantity of electricity

coulomb

C

A·s

V

Potential difference or Electromotive force

volt

V

J/C = kg·m2·s−3·A−1

R, Z, X

Resistance, Impedance, Reactance

ohm

Ω

V/A = kg·m2·s−3·A−2

ρ

Resistivity

ohm metre

Ω·m

kg·m3·s−3·A−2

P

Power, Electrical

watt

W

V·A = kg·m2·s−3

C

Capacitance

farad

F

C/V = kg−1·m−2·A2·s4

 

Elastance

reciprocal farad

F−1

V/C = kg·m2·A−2·s−4

E

Electric field

volt per metre

V/m

N/C = kg·m·A−1·s−3

D

Electric displacement field

coulomb per square metre

C/m2

A·s·m−2

ε

Permittivity

farad per metre

F/m

kg−1·m−3·A2·s4

χe

Electric susceptibility

(dimensionless)

G, Y, B

Conductance, Admittance, Susceptance

siemens

S

Ω−1 = kg−1·m−2·s3·A2

σ

Conductivity

siemens per metre

S/m

kg−1·m−3·s3·A2

B

Magnetic field (Magnetic flux density)

tesla

T

Wb/m2 = kg·s−2·A−1 = N·A−1·m−1

Φm

Magnetic flux

weber

Wb

V·s = kg·m2·s−2·A−1

H

Magnetizing field

ampere per metre

A/m

A·m−1

 

Reluctance

ampere-turn per weber

A/Wb

kg−1·m−2·s2·A2

L

Inductance

henry

H

Wb/A = V·s/A = kg·m2·s−2·A−2

μ

Permeability

henry per metre

H/m

kg·m·s−2·A−2

χm

Magnetic susceptibility

(dimensionless)

 

Other units

 

· gauss — The gauss, abbreviated as G, is the cgs unit of magnetic field (B).
· oersted — The oersted is the CGS unit of magnetizing field (H).
· maxwell — is the CGS unit for the magnetic flux.
· gamma — is a unit of magnetic flux density that was commonly used before the Tesla became popular (1 gamma = 1 nT)
· μo — common symbol for the permeability of free space (4πx10-7 N/(ampere-turn)²).

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Comments»

1. sciencemagnets - February 22, 2009

maganda ung page nio…cool!!..pero comment ko lang sa technicals…

ung ibang images..hindi maxadong nexplain…

ty..and Godbless


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