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Find the current flowing through the 3 ohm resistor.

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  1. Jul 13, 2017 #1
    • Poster reminded to use the Homework Help Template in the future for schoolwork posts
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    Last edited: Jul 13, 2017
  2. jcsd
  3. Jul 13, 2017 #2
    You need to show your attempt at a solution.
    Have you computed the total resistance of that resistor network?
    What is that -(.)- symbol?
     
  4. Jul 13, 2017 #3
    The (.) means a closed key= closed circuit. THe current is flowing.
    I have done this:
    1/R= 1/6+1/3= 3/6= 1/2 (the 6 ohm and 3 ohm resistors are in ||)
    R= 2 ohms
    Now:
    (2+10) ohms= 12 ohms (They are now in series)
    Acc. to Ohm's law:
    I= V/R
    = 12/12
    = 1 Ampere
    Now I have found the total current in the circuit.
    But I need to find the current through the 3 ohm resistor. I can't do it. Please help me find the current through the 3 ohm resistor.
     
  5. Jul 13, 2017 #4
    You have 1 amp across the 3-ohm/6-ohm pair. You know the resistance of that pair, so you can compute the voltage drop across it.
    Then you will know the voltage across the 3-ohm.
     
  6. Jul 13, 2017 #5
    Current through the 3Ω resistor can be calculated if you know the voltage across it.
    Is it possible to determine what this voltage is?
     
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