Measuring values in electronics

These are the kinds of values we need to be able to measure:

Quantity

Symbol

Unit

Current

I

Ampere (A)

Voltage

V

Volt (V)

Resistance

R

Ohm (W)

Frequency

ƒ

Hertz (Hz)

Capacitance

C

Farad (F)

Inductance

L

Henry (H)

Power

P

Watt (W)

These are the prefixes used to describe very large or very small values

Value

Prefix

Symbol

1012

tera

T

109

giga

G

106

mega

M

103

kilo

k

10-3

milli

m

10-6

micro

m

10-9

nano

n

10-12

pico

p

10-15

femto

f

eng notation