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Problem with a 'simple' equation?

  1. Jan 25, 2015 #1
    https://scontent-a-sin.xx.fbcdn.net/hphotos-xpf1/v/t1.0-9/q83/s720x720/960276_419358564889369_6107296607749832321_n.jpg?oh=848f1c866e20f0178f835cfec07b41b4&oe=555E6332

    Okay so, the main equation was this-
    i = E/R + Ae^[-(RT)/L]

    My problem is with the equation no. 2.
    How do we get e^t/lamda when lamda = R/L? It should be e^t*lamda and where did the minus symbol go (the one in the power of e). And to equate i = i not it has to be (1 - e^t/lamda) = 1 and if t tends to infinity that's not possible in any way!

    Please tell me where I am doing wrong! HELP!
     
  2. jcsd
  3. Jan 25, 2015 #2

    Stephen Tashi

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    Science Advisor

    The page has an error. Lambda should be L/R. The typography of the book puts a minus sign on the same level as the line for a fraction, so I think the exponent that looks like [itex] \frac{t}{\lambda} [/itex] is really [itex] \frac{-t}{\lambda} [/itex]. To be correct, it should have the minus sign.
     
  4. Jan 25, 2015 #3
    Thanks so much! I just needed a confirmation!!
     
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