Units & Dimensions
Chart depicting Basic derivation of units. We will consider SI Units since we are following SI convention in India & in most countries globally. We will come across most of these units through the duration of our studies, refer to it when in doubt.
Macro/Micro Prefixes
In order to deal with extremely small or large numbers easily, we add these prefixes before the unit to denote the magnitude by which the number that follows is bigger or smaller when compared to the standard unit
| MACRO Prefixes | MICRO Prefixes |
|---|---|
| Kilo (K) 10^3 Mega (M) 10^6 Giga (G) 10^9 Tera (T) 10^12 Peta (P) 10^15 Exa (E) 10^18 Zetta (Z) 10^21 Yotta (y) 10^24 |
milli (m) 10^-3 micro (μ) 10^-6 nano (n) 10^-9 pico (p) 10^-12 femto (f)10^-15 atto (a) 10^-18 zepto (z) 10^-21 yocto (y) 10^-24 |
| A common example for Macro Prefixes are found in digital storage media in databytes(b) or Power measured in Watts(W) |
| MACRO Prefixes | Databyte | Watt |
|---|---|---|
| Kilo (K) 10^3 Mega (M) 10^6 Giga (G) 10^9 Tera (T) 10^12 Peta (P) 10^15 Exa (E) 10^18 Zetta (Z) 10^21 Yotta (y) 10^24 |
Kilobyte (Kb) 10^3 Megabyte (Mb) 10^6 Gigabyte (Gb) 10^9 Terabyte (Tb) 10^12 Petabyte (Pb) 10^15 Exabyte (Eb) 10^18 Zettabyte (Zb) 10^21 Yottabyte (yb) 10^24 |
Kilo Watt (KW) 10^3 Mega Watt (MW) 10^6 Giga Watt (GW) 10^9 Tera Watt (TW) 10^12 Peta Watt (PW) 10^15 Exa Watt (EW) 10^18 Zetta Watt (ZW) 10^21 Yotta Watt (yW) 10^24 |
A common example in the Micro scale would be the SI unit for length, meter(m)
| MICRO Prefixes | Length (metre) |
|---|---|
| milli (m) 10^-3 micro (μ) 10^-6 nano (n) 10^-9 pico (p) 10^-12 femto (f)10^-15 atto (a) 10^-18 zepto (z) 10^-21 yocto (y) 10^-24 |
millimeter (mm) 10^-3 micrometer (μm) 10^-6 nanometer (nm) 10^-9 picometer (pm) 10^-12 femtometer (fm)10^-15 attometer (am) 10^-18 zeptometer (zm) 10^-21 yoctometer (ym) 10^-24 |
Electrical Units
The Graphic below denotes units and dimension specific to the domain of Electrical Power & Energy, these will come in handy as we progress through the course as we will refer to them very often
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Cells in Series/Parallel
