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anonymous

  • one year ago

In the circuit shown, the lowest voltage drop will occur across which of the following resistors? R1, R2, R3, or R4 ?

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  1. anonymous
    • one year ago
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  2. Michele_Laino
    • one year ago
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    here, the total resistance, is: \[\Large {R_{TOTAL}} = 8.5 + 3.2 + \frac{1}{{\frac{1}{{13}} + \frac{1}{{18}}}} = ...\]

  3. anonymous
    • one year ago
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    ok! so we get 19.248?

  4. Michele_Laino
    • one year ago
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    ok!

  5. Michele_Laino
    • one year ago
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    current is: \[\Large I = \frac{V}{{{R_{TOTAL}}}} = \frac{{15}}{{19.25}} = ...\]

  6. anonymous
    • one year ago
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    0.779?

  7. Michele_Laino
    • one year ago
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    ok!

  8. Michele_Laino
    • one year ago
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    voltage drops: \[\Large \begin{gathered} {V_1} = {R_1}I = 8.5 \times 0.78 = ... \hfill \\ {V_{AB}} = {R_{AB}}I = 7.55 \times 0.78 = ... \hfill \\ {V_4} = {R_4}I = 3.2 \times 0.78 = ... \hfill \\ \end{gathered} \] where: V_AB is the voltage drop across R_2 and the voltage drop across R_3

  9. anonymous
    • one year ago
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    6.63 5.889 2.496 ?

  10. Michele_Laino
    • one year ago
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    ok!

  11. anonymous
    • one year ago
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    lowest would be R4? :/

  12. Michele_Laino
    • one year ago
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    that's right!

  13. anonymous
    • one year ago
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    yay! thanks!!:)

  14. Michele_Laino
    • one year ago
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    :)

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