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Scientific and Engineering Notation
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Prefixes and Conversions
Prefixes : Are used to eliminate zeros from a given value Conversions : Change the numeric value of a measurement from one prefix’s value to another prefix’s value.
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Prefixes and Conversions
Whole Values are: VOLTS, AMPS, OHMS, FARAD, HERTZ etc. Whole Values have all of the zeros or decimal places in their number value: 3000 volts amps 5,000,000 ohms farads 560,000 hertz Prefixes are added to whole value electrical measurements to eliminate zeros or decimal places: 3 K volts 1 K amps 5 M ohms u farad 560 K Hertz
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Prefixes and Whole Values
Prefix Symbol Move decimal Value + 3 + 6 “whole values” Amp, Volt, Ohm, Farad, Hertz - 3 - 6 - 9 - 12 Mega= 1,000, M places M Kilo= 1, K places K milli= m places m micro= u places u nano = n places n pico= p places p
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Conversions: Example 1 5,000,000. = 5 M ohms M Ohms / M ohms
Convert the following: 5,000,000 ohms = _?_ M ohms Prefixes: Symbol: Mega = + 6 M Kilo = + 3 K Whole values = 0 milli = - 3 m micro = -6 u nano = -9 n pico = -12 p 1. Determine the decimal places of each 2. Which prefix is larger ? 3. Which number will be larger / smaller? 4. Move the decimal to produce the correct answer. M Ohms / M ohms 6 places left 5,000,000. = 5 M ohms
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Conversions: Example 2 1 u fd .000001 fd = farad u farad / farad
Convert the following: fd = _?_ u fd Prefixes: Symbol: Mega = + 6 M Kilo = + 3 K Whole values = 0 milli = - 3 m micro = -6 u nano = -9 n pico = -12 p 1. Determine the decimal places of each 2. Which prefix is larger ? 3. Which number will be larger / smaller? 4. Move the decimal to produce the correct answer. farad u farad / farad 6 places to right fd = 1 u fd
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