Physics for IGCSE & O level - Electricity (Section 8 - No. 31)
If two resistors are connected in series and have values of 10 ohms and 20 ohms, what is the total resistance?
10 ohms
20 ohms
30 ohms
2 ohms
คำอธิบาย
The total resistance is the sum of the individual resistances in a series circuit: 10 + 20 = 30 ohms.