Also you need to know the Units in Electronics

0 comments 2010-11-25 12:26:47 views

The unit (and unit symbol) which is used to measure each quantity. For example: Charge is measured in coulombs and the symbol for a coulomb is C.

Some of the units have a convenient size for electronics, but most are either too large or too small to be used directly so they are used with the prefixes shown in the second table. The prefixes make the unit larger or smaller by the value shown.

Some examples:
25 mA = 25 × 10-3× 0.001 A = 0.025 A
47µF = 47 × 10-6× 0.000 001 F = 0.000 047 F
270kΩ = 270 × 103 Ω= 270 × 1000 Ω= 270 000 Ω F = 47 A = 25

Prefix	Prefix Symbol	Value
milli	m	10-3	=0.001
micro	µ	10-6	=0.000 001
nano	n	10-9	=0.000 000 001
pico	p	10-12	=0.000 000 000 001
kilo	k	103	=1000
mega	M	106	=1000 000
giga	G	109	=1000 000 000
tera	T	1012	=1000 000 000 000