In the Metric System you will encounter prefixes for numbers, in electronics right from resistors to hard disks these units are used. So you have to have in memory at least the ones below so that you place the correct value of cap or inductor in your circuit.
See SI Units or Metric Units to read more about these. R, C and L are given values with these prefixes. We have resistors like 10 Tera Ohms of Glass Surface Resistance to 1 Micro Ohms of a Small Copper Wire Resistance. 1 Pico Farad of Capacitance of two Large PCB Tracks in a Multi Layer PCB to 10 Milli Farad of a Huge Electrolytic Filter. Then Lastly 10 Nano Henrys Inductance of the Twisted Connector Cables in a Computer and 1 Henry of a Powerful Choke that can kickback 10 Kilo Volts when a 10 Amps current thru it is broken. Electronics is Fun, is it Not.
Exponents
| Tera | 1000,000,000,000 | 1.e+12 |
| Giga | 1000,000,000 | 1.e+9 |
| Mega | 1000,000 | 1.e+6 |
| Kilo | 1000 | 1.e+3 |
| units | 1 | 1.e+0 |
| milli | 1 / 1000 | 1.e-3 |
| micro | 1 / 1000,000 | 1.e-6 |
| nano | 1 / 1000,000,000 | 1.e-9 |
| pico | 1 / 1000,000,000,000 | 1.e-12 |
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