A series circuit contains three resistors, R1=370 ohms, R2=480 ohms, and R3= 279 ohms. They are connected to a potential difference of 55 volts. How much current will flow through R2?
Resisters in series can be added together to get an equivalent resistance. Then just use I=V/R to find the current of the series. Since current is constant in a series circuit, that answer is the current through resister 2.