doubt in maximum power transfer theorem

Discussion in 'General Electronics Chat' started by shiva bharadwaj, Oct 8, 2008.

  1. shiva bharadwaj

    Thread Starter Member

    Sep 29, 2008
    19
    0
    In this theorem load resistance should be equal to the thevenin's equivalent of the network which supplies power.
    But when load resistance is more compared to thevenin's equiavlent there will be more voltage drop across the load .Isn't that preferred?
    So why should those both resistances be equal?
    I know my approach is wrong here,please correct me.
     
  2. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    Yes, the voltage drop will be greater but the current will decrease (the voltage source is constant) so the power does not increase but instead it decreases.
     
  3. hgmjr

    Moderator

    Jan 28, 2005
    9,030
    214
    Here is a link to the material on maximum power transfer theorem contained in the AAC ebook. Well worth taking a look at to help clarify the topic.

    hgmjr
     
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