physics
posted by Rony .
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?

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