Results 1 to 4 of 4

Math Help - 5 mA, 50 mV 10ohms, could be used to measure a current.

  1. #1
    Junior Member turbod15b's Avatar
    Joined
    Dec 2006
    Posts
    57

    5 mA, 50 mV 10ohms, could be used to measure a current.

    how do i show the formulae used

    can someone show me how to draw a diagram including componenet values plz

    cheers.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Forum Admin topsquark's Avatar
    Joined
    Jan 2006
    From
    Wellsville, NY
    Posts
    9,854
    Thanks
    321
    Awards
    1
    Quote Originally Posted by turbod15b View Post
    how do i show the formulae used

    can someone show me how to draw a diagram including componenet values plz

    cheers.
    It looks like you are trying to use Ohm's Law? I think you need to tell us what the actual question is so we can help you answer it. There's precious little information here!

    -Dan
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Junior Member turbod15b's Avatar
    Joined
    Dec 2006
    Posts
    57
    show, with the aid of a simple hand drawn diagram including component values, how a meter movement labelled: 5mA, 50 mV, 10 ohms, could be used to measure a current of 1A in a circuit.

    clearly show the formulae used, & working out required, to calculate the necessary component values

    Follow Math Help Forum on Facebook and Google+

  4. #4
    Super Member
    earboth's Avatar
    Joined
    Jan 2006
    From
    Germany
    Posts
    5,829
    Thanks
    123
    Quote Originally Posted by turbod15b View Post
    show, with the aid of a simple hand drawn diagram including component values, how a meter movement labelled: 5mA, 50 mV, 10 ohms, could be used to measure a current of 1A in a circuit.

    clearly show the formulae used, & working out required, to calculate the necessary component values

    Hello,

    to measure the current you have to use a shunt which divides the current into two branches: The smaller amount (here 5 mA) passes through the meter, the bigger amount (here: 995 mA) passes through the resistor. See attachment.

    Formulae in a parallel circuit:
    math]U_{total}=U_1=U_2=...[/tex]
    math]I_{total}=I_1+I_2+...[/tex]
    math]\frac{1}{R_{total}}=\frac{1}{R_1}+\frac{1}{R_2}+.. .[/tex]

    You can take the results for your problem from the sketch.

    EB

    PS:: I've made a mistake typing Latex code but I couldn't find it. So I send you this reply as plain text. Hope it is useful nevertheless.
    Attached Thumbnails Attached Thumbnails 5 mA, 50 mV 10ohms, could be used to measure a current.-nebenwiderst1.gif  
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Showing that a specific outer measure is a measure
    Posted in the Differential Geometry Forum
    Replies: 2
    Last Post: August 16th 2011, 11:50 AM
  2. Replies: 3
    Last Post: September 27th 2009, 11:13 AM
  3. Replies: 1
    Last Post: September 27th 2009, 09:28 AM
  4. current
    Posted in the Advanced Applied Math Forum
    Replies: 2
    Last Post: February 26th 2008, 12:50 PM
  5. how much current flows through bar.
    Posted in the Advanced Applied Math Forum
    Replies: 1
    Last Post: February 12th 2008, 06:28 PM

Search Tags


/mathhelpforum @mathhelpforum