Appendix 1

Units, symbols and suffixes

I have used standard units, symbols and suffixes throughout this work. Here they are:

Units

Ω or R: ohms (resistance)

F: farads (capacitance)

H: henries (inductance)

s: seconds (time)

Hz: hertz (frequency)

°: degrees (phase angle)

V: volts (electrical potential)

A: amperes (electrical current)

W: watts (power)

J: joules (energy or work)

Symbols

R: resistance

C: capacitance

L: inductance

V: voltage

I: current

XC: capacitive reactance

XL: inductive reactance

Z: impedance

f: frequency

ϕ: phase angle

fO: resonant frequency

Zo: dynamic (resonant) impedance

Electronics engineers tend to deal in a very wide range of numbers, from million-millionths of farads to millions of ohms. Hence it is usual to use a range of letter suffixes to indicate the order of magnitude of a number.

These are the standard suffixes used in this book:

p: × 10−12

n: × 10−9

?: × 10−6

m: × 10−3

k: × 103

M: × 106

So, for instance, image = 1mA; 1M × 1 nF = 1ms; and so on.

..................Content has been hidden....................

You can't read the all page of ebook, please click here login for view all page.
Reset