Physics for IGCSE & O level - Electricity (Section 3 - No. 50)
What is the total resistance of two resistors, one of 3 ohms and the other of 6 ohms, connected in parallel?
9 ohms
2 ohms
18 ohms
0.5 ohms
説明
Use the formula for parallel resistors: 1/R_total = 1/3 + 1/6 => R_total = 2 ohms.