1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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

    User Avatar
    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!!
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Problem with a 'simple' equation?
  1. Simple problem (Replies: 1)

  2. Simple problem (Replies: 6)

Loading...