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Electric Energy, 3rd Edition by Mohamed A. El-Sharkawi

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Appendix A: Units and Symbols

Variable

Unit

Variable

Unit

Time t

Second (s)

Length l

Meter (m)

Electric current I

Ampere (A)

Electric potential (E or V)

Volt (V)

Electric resistance R

Ohm (Ω)

Resistivity ρ

Ω-m

Capacitance C

Farad (F) or s/Ω

Inductance L

Henry (H) or Ω-s

Charge q

Coulomb or A-s

Frequency f

Hertz (Hz or cycles/s)

Magnetic flux φ

Weber or V-s

Magnetic field density B

Tesla or V-s/m2

Magnetic field intensity H

A/m

Reluctance ℜ

A turn/weber

Magnetomotive force ℑ

A turn

Permeability μ

H/m or N/A2

Electric real power P

Watt (W)

Electric reactive power Q

VAr

Electric apparent power S

VA

Mechanical power P

Horse power ...

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