Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Parallel circuits and current

  1. Jan 12, 2009 #1
    ok this is a simple question and i have the idea but just not 100% sure
    If two legs of a parallel circuit have about the same about amount of current, what can you say about the resistance of each of these legs?

    My answer is that both legs most probable have the same object(resistors), there resistance would be very alike

    any corrections?

    Another question was

    Paul’s Super Marco video game uses batteries that produce 3 V. If the circuitry produces a resistance of 15 Ω, how much current is generated in the game?

    I came up with
    .2 current generated in game
    on the rubric for the question it says
    Reversing Ohms and Volts in formula (15/3)=10 points
    im not quite sure what they mean by that any help would be great
  2. jcsd
  3. Jan 12, 2009 #2


    User Avatar
    Homework Helper

    Re: Circuits!!

    Your solution looks good.
    Maybe the rubric means you would get or lose 10 points for writing 15/3 instead of 3/15.

    It would be a very good habit to get into to write your solution this way:
    I = V/R = 3/15 = 0.2
    So easy to follow, you won't get mixed up and your marker will enjoy your work!
  4. Jan 12, 2009 #3
    Re: Circuits!!

    o ok thank you for your help. yeah i was confused about the rubric and what it meant thanks for the help.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook