We have seen that either METRIC PREFIXES or POWERS of 10 may be used to replace the
zero digits in very large or small measurements.
For example: .000000000005 V = 5 X 10-12 V or 5 pV
33,000,000 Ω =33 X 106 Ω or 33 mΩ
Usually, to solve a problem involving electrical measurements, all numbers with prefixes are
converted to basic units times powers of 10. After the problem is solved, the answer may be
expressed with a prefix if required or desired.
Which of the following expressions are equivalent to .0000068 mA?
6.8 X 10-12 A
6.8 X 10-9 A