Table 3.2. Some Derived SI Units

Quantity			Measurement Term
Name	Common Symbol	Name of Unit	Symbol for Unit	Expression in Terms of Other Units	Expression in Terms of SI Base Units
capacitance	C	farad	F	C/V	m-2 · kg-1 · s4 · A2
charge	q	coulomb	C	A · s	s · A
conductance	G	siemens	S	-1 or A/V	m-2 · kg-1 · s3 · A2
conductivity		siemens per meter	S/m	-1 · m-1	m-3 · kg-1 · s3 ·A2
current density	J	ampere per square meter	A/m-2		m-2 · A
electric-field intensity	E	volts per meter	V/m		m · kg · s-3 · A-1
electric-flux density (displacement)	D	coulomb per square meter	C/m2		m-2 · s · A
energy	W	joule	J	N · m	m2 · kg · s-2
energy-flux density (power density)	S	watt per square meter	W/m2	J · s-1 · m-2	kg · s-3
frequency	f	hertz	Hz		s-1
impedance	Z	ohm		V/A	m2 ·kg · s-3 ·A-2
inductance	L	henry	H	Wb/A	m2 · kg · s-2 · A-2
magnetic-field intensity	H	ampere per meter	A/m		m-1 · A
magnetic-flux density	B	tesla	T	Wb/m2	kg · S-2 · A-1
permeability	µ	henry per meter	H/m		m · kg · s-2 · A-2
permittivity		farad per meter	F/m		m-3 · kg-1 · s4 · A2
power	P	watt	W	J/s	m2 · kg · s-3
reactance	X	ohm		V/A	m2 · kg · s-3 · A-2
resistance	R	ohm		V/A	m2 · kg · s-3 · A-2
resistivity		ohm meters	m		m3 · kg · s-3 · A-2
voltage (potential difference)	V	volt	V	W/A	m2 · kg · s-3 · A-1

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