NO 101
INTRODUCTION TO CONVERSION OF ELECTRICAL UNITS
The volt, the ohm, and the ampere are the basic units of electrical measurements. You previously
learned that one ampere of current flows through one ohm of resistance when one volt of
electrical force is applied across the resistance.
Often, the unit of measurement (volt, ohm, and ampere) is expressed with a prefix to enable the
handling of extremely large or extremely small electrical measurements. For example, electrical
values expressed in basic units, such as 40,000 volts and .005 ampere, could be expressed in
units with prefixes, such as 40 kilovolts and 5 milliamperes.
Thus, it can be seen that any unit of electrical measurement can be expressed with or without a
prefix.
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2-3
IT 0332
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