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zaphod Group Title

What is the value of current in A1, A2 and A3

  • one year ago
  • one year ago

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  1. zaphod Group Title
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    http://screencast.com/t/FGxsE787eeNs

    • one year ago
  2. zaphod Group Title
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    @TuringTest @Preetha @Omniscience @amistre64 @Algebraic!

    • one year ago
  3. nubeer Group Title
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    ok lets try this.. can you find the total resistance of the circuit?

    • one year ago
  4. zaphod Group Title
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    1/4 + 1/6 + 2 = total resistance

    • one year ago
  5. nubeer Group Title
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    as a matter of fact no.. 1/r = 1/r1+1/r2

    • one year ago
  6. zaphod Group Title
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    can u show the working

    • one year ago
  7. nubeer Group Title
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    first just try to find the resistance in parallel then add it in series one so u dont make mistake.. and ok let me

    • one year ago
  8. nubeer Group Title
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    first just find the parallel part of resistance.. 1/r = 1/6+1/4 1/r = 5/12 agreed?

    • one year ago
  9. zaphod Group Title
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    ok total resistance = 12/5 + 2

    • one year ago
  10. nubeer Group Title
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    yes.. that's it.. so you have R now.. you also have V given so appply V=IR find I from here it will be your A1

    • one year ago
  11. zaphod Group Title
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    ok wt will A2 nd A3 be?

    • one year ago
  12. nubeer Group Title
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    ok.. now if you know.. when a resitor in series there is a drop in voltage.. and in parallel all resistors have same voltage.

    • one year ago
  13. nubeer Group Title
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    so find the drop on 3ohm resistor which is in series by V=IR

    • one year ago
  14. zaphod Group Title
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    i dont get that part. now the current in a1 = 2.72 amps, so the voltage is 12v?

    • one year ago
  15. nubeer Group Title
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    the volatge of whole circuit is 12V .. now you have to find the drop in voltage across just 3ohm resistor.. means a voltage is decreased at the 3 ohm resitor.. you have to find how much 3ohm took and what is remaining left.. like this .. if A=2.72 and R=3 V=2.72*3 = ?

    • one year ago
  16. zaphod Group Title
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    oh okay...so voltage = 8.18 V, then what do i do

    • one year ago
  17. nubeer Group Title
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    ok means from 12V.. 3ohm took 8.18V.. how much voltage is left.?

    • one year ago
  18. zaphod Group Title
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    3.81V

    • one year ago
  19. nubeer Group Title
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    ok so now 3.81 V will move on.. now the part is parallel resistors .. when resistors are in paralle they both have same voltage... so 6ohm and 4ohm resistor have same voltage. now again you can find I by V=IR

    • one year ago
  20. zaphod Group Title
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    means both the resistors hve 3.81 V

    • one year ago
  21. nubeer Group Title
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    yes.

    • one year ago
  22. nubeer Group Title
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    because they are in parallel..

    • one year ago
  23. zaphod Group Title
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    okay thanks...great help du knw anyother easy method of solving this

    • one year ago
  24. nubeer Group Title
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    lol .. its pretty easy.. you just have to do more practise.. it just take 1 min for me to solve.. maybe you can ask someone else for other method.. but this is the only one i know for now.

    • one year ago
  25. furnessj Group Title
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    i am not actually great at these, but i am worried you have some mistakes. The total resistance is 12/5 + 3 = 5.4 ohms. Then the current A1 = 2.22 A. Plus now, it is easy to split the current between the 4 and 6 ohm resistors. the 4 ohm gets (4/10) * 2.22 , the 6 gets (6/10) * 2.22. Does this help/do you agree?

    • one year ago
  26. nubeer Group Title
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    i am sorry.. i havent checked the calculations.. i thought he might have done right.. i was just trying to convey the concept.. and ya i think i agree.

    • one year ago
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