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physics

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A 15.0 Ohms resistor is connected in series to a 120V generator and two 10.0 Ohms resistors that are connected in parallel to each other.
-What is the total resistance of the load?
-What is the magnitude of the circuit current?
-What is the current in one of the 10.0 Ohms resistors?
-what is the potential difference across 15.0 Ohms resistor?

  • physics -

    for the two in parallel
    1/10 + 1/10 = 2/10
    so Req = 5 Ohms
    add the 15 to get total R = 20 Ohms
    i = V/R = 120/20 = 6 amps total
    half of the current through each = 3 amps
    V = i R = 6*15 = 90 Volts

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