- Electricity & Magnetism
Equivalent Resistance and Current
Two 70 ohm resistors are connected in parallel. This parallel arrangement is connected in series with a 30 ohm resistor. The combination is then placed across a 130 V battery.
What is the equivalent resistance of the parallel portion of the circuit? What single resistance could replace the three original resistors? What is the current delivered by the battery?
For the two parallel resistors 70 ohms each, the equivalent resistance is
R1R2 / (R1 + R2) = 70 * ...