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Conversion factor from amperes to milliamperes

  1. Jun 7, 2003 #1
    can anyone tell me the conversion factor from amperes to milliamperes?
    I know that milli is 10^-3 but i dont understand how it would look. like for example, 3.5 amperes is how many milliamperes? is it that 3.5 x 10^-3 = 0.0035 amperes?
     
    Last edited by a moderator: Feb 5, 2013
  2. jcsd
  3. Jun 7, 2003 #2
    Re: amps

    1 Ampere = 103 mA (milliamperes)
    3.5 A = 3.5 * 103 mA

    It is similar to
    1 m = 103mm = 1000 mm
     
  4. Jun 8, 2003 #3
    Re: amps

    It is three thousand five hundred milliamperes.
     
  5. Jun 8, 2003 #4
    so its 3.5 divide 10^-3 in other words?
     
  6. Jun 8, 2003 #5
    Incorrect, you wouldn't divide but instead multiply. Otherwise you would get 3,500 amps.
     
  7. Jun 8, 2003 #6

    FZ+

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    Hmm... let's try to de-confuse here.

    You state, very correctly that 1 A = 1000 mA = 1*10^3 mA

    Now, divide that by 1000...

    1*10^-3 A = 1 mA

    This is your conversion factor.

    Let's multiply the first equation by 3.5...

    3.5 A = 3500 mA = 3.5 * 10^3 mA

    There you go...
     
  8. Jun 8, 2003 #7

    Dx

    User Avatar

    Re: amps


    heres how I remember...
    think of a line eg. -3, -2, -1, 0 ,1,2,3. get my picture?
    anyways see what direction negative goes left, right?
    see what direction positive goes to the right, do you see?

    here the magic...
    pretend your number 3.5 is on the zero line.
    and the 10^-3, the -3 is telling you what direction to go to the left, got it!
    Dx :wink:
     
  9. Jun 9, 2003 #8
    so many technical explanations.

    when it is 10 to the power of somthing, just move the decimal place that many places and you will get the original value

    100 mA = 100.00
    m = milli = 10^-3
    so by moving the decimal place 3 places left you get
    .1A which equals 100mA

    you do the same to reverse it .1A to mA is done by moving the decimal place 3 places to the right

    try and remember this:

    10^18 = exa = E
    10^15 = peta = P
    10^12 = tera = T
    10^9 = giga = G
    10^6 = mega = M
    10^3 = kilo = k
    10^-3 = milli = m
    10^-6 = micro = ...cant find symbol but its similar to u
    10^-9 = nano = n
    10^-12 = pico = p
    10^-15 = femto = f
    10^-18 = atto = a

    once you get used to doin it it becomes easy
     
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