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Math Help - I keep getting wrong answer for sim[;e physics

  1. #1
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    I keep getting wrong answer for sim[;e physics

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    If power is 10 to the 6 and resistance is 100 ohms, what is my current
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by Greg View Post
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    If power is 10 to the 6 and resistance is 100 ohms, what is my current
    How does the attachment relate to this question? What is "a"?

    RonL
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    Sorry I got my questions mixed up. Itwas only the physics one I had trouble with
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    Grand Panjandrum
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    Quote Originally Posted by Greg View Post
    Sorry I got my questions mixed up. Itwas only the physics one I had trouble with
    P=vi
    v=iR,

    so:

    P=Ri^2,

    or:

    i=sqrt(P/R)=sqrt(10^6/10^2)=100 amps

    RonL
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    Quote Originally Posted by Greg View Post
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    If power is 10 to the 6 and resistance is 100 ohms, what is my current
    Though CaptainBlack is doubtless correct in his solution I would like to point out to Greg that you need to use units!
    P = 10^6 W? kW? mW? Some other unit? We just don't know!

    Oh, and since I'm ranting ( ) the unit for resistance is "Ohms" with a capital "O" because it is named for a person.

    -Dan
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