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17 September, 15:20

A combined circuit has two resistors in series (27.5 ohms and 33.0 ohms) and another in parallel (22.0 ohms). If the power source is 9.0 volts, what will the current be?

A. 0.062 amps

B. 16 amps

C. 0.56 amps

D. 0.32 amps

E. 39 amps

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Answers (1)
  1. 17 September, 19:16
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    R 1,2 = 27.5 + 33.0 = 60.5 Ohms

    1 / R 1,2,3 = 1 / 60.5 + 1 / 22 = 82.5 / 1331

    R 1, 2, 3 = 1331 / 82.5 = 16.13 Ohms

    I = U / R

    I = 9 V / 16.13 Ohms = 0.557 A ≈ 0.56 A

    Answer: C) 0.56 Amps
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