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anonymous

  • one year ago

Which of the following statements is true about the circuit shown? A. P1 > P2 > P3 B. P2 > P3 > P1 C. P1 > P3 > P2 D. P1 = P2 = P3

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  1. anonymous
    • one year ago
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  2. Michele_Laino
    • one year ago
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    are P_1, P_2 and P_3 the dissipated powers?

  3. anonymous
    • one year ago
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    yes i believe so!

  4. Michele_Laino
    • one year ago
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    across each resistor, the voltage drop is 12 volts

  5. Michele_Laino
    • one year ago
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    now the current in R_1 is: 12/2=...

  6. anonymous
    • one year ago
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    6!

  7. Michele_Laino
    • one year ago
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    and the power P_1, is_ P_1= 12*6=...

  8. anonymous
    • one year ago
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    72!

  9. Michele_Laino
    • one year ago
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    ok! Now the current into R_2 is: 12/8=...

  10. anonymous
    • one year ago
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    1.5!

  11. Michele_Laino
    • one year ago
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    and the power P_2 is: 8*1.5=...

  12. anonymous
    • one year ago
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    12!

  13. anonymous
    • one year ago
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    ok so that means so far, P1 > P2 ? how do we find P3?

  14. Michele_Laino
    • one year ago
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    ok! Now the current into R_3 is: 12/5=...

  15. anonymous
    • one year ago
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    oh okie! err we get 2.4!

  16. Michele_Laino
    • one year ago
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    ok! and the power P_3 is: P_3= 12*0.24=...

  17. anonymous
    • one year ago
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    wait is it 12*2.4?

  18. anonymous
    • one year ago
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    since 12/5=2.4?

  19. Michele_Laino
    • one year ago
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    sorry, yes! 12*2.4=...

  20. anonymous
    • one year ago
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    ooh okie! so we get 28.8! so we have this? P1=72 P2=12 P3=28.8 so P1 > P3 > P2 so choice C is our solution?

  21. Michele_Laino
    • one year ago
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    ok! correct!

  22. anonymous
    • one year ago
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    yay!! thank you!!:)

  23. Michele_Laino
    • one year ago
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    :):)

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