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Series and Parallel Quesrions

  1. Mar 3, 2009 #1
    i really have no clue how to do these. they seem more conceptual. any hints would be welcome! thanks!

    1. Prove that when n identical resistors of resistance R are connected in parallel the equivalent resistance is R/n.

    2. A piece of copper wire of resistance R is cut into 3 equal parts. When these 3 parts are connected in parallel, what is the resistance of the combination?

    3. Say you have a series and parallel circuit. Resistors 2 and 3 are parallel to each other. Resistor 1 is in series with them. When you increase the resistance of 3, what happens to current and voltage values?

    Thanks!
     
  2. jcsd
  3. Mar 3, 2009 #2

    lanedance

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    Homework Helper

    hi stonn
    do you know the equations for combining resistance in parallel & series?
     
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