The equivalent resistance of three resistors in parallel is 2 ohm. If two of them are 4 ohm and 6 ohm, the third resistance is
Q1. The equivalent resistance of three resistors in parallel is 2 ohm. If two of them are 4 ohm and 6 ohm, the third resistance is
Answer: 12 ohm
Explanation: Using 1 / Rp = 1 / R1 + 1 / R2 + 1 / R3, where Rp = 2, R1 = 4, R2 = 6, we solve to get 1 / R3 = 1 / 2 - 1 / 4 - 1 / 6 = 1 / 12, hence R3 = 12 ohm