**T5B03: ***How many volts are equal to one kilovolt?*

A. One one-thousandth of a volt

B. One hundred volts

C. One thousand volts

D. One million volts

These types of Technician questions boil down to interpreting the prefix that’s added to the unit. In this case the unit is the electrical measure of electromotive force (EMF), volts. The prefix kilo has been added to the unit volts in the question. These kinds of mathematical prefixes are essentially multipliers, but you have to know by how much to multiply for a given prefix! Here’s the common mathematical prefixes you’ll find in ham radio, and the bold ones are contained in at least one Technician exam pool question.

prefix |
multiplier |
numerical value |
decimal value |

pico |
one trillionth | 1/1,000,000,000,000 | 0.000000000001 |

nano |
one billionth | 1/1,000,000,000 | 0.000000001 |

micro |
one millionth | 1/1,000,000 | 0.000001 |

milli |
one thousandth | 1/1,000 | 0.001 |

unity (one) | 1 | ||

kilo |
one thousand | 1,000 | |

mega |
one million | 1,000,000 | |

giga |
one billion | 1,000,000,000 |

The prefix kilo means 1,000. So, a kilovolt is 1,000 volts. The correct answer to question T5B03, “How many volts are equal to one kilovolt?” is **C. One thousand volts**.

You should also know that when converting between these prefixed units, the decimal point in a provided value shifts three positions for each “step” in the list of prefixes above. See the **HamRadioSchool.com Technician License Course book** Section 8.3 (p.136-138) for a thorough discussion of unit conversions. Also see the related questions listed below that will test your prefix and conversion knowledge.

Related Questions: T5B01, T5B02, T5B03, T5B04, T5B05, T5B06, T5B07, T5B08, T5B09