Physics for IGCSE & O level - Electricity (Section 7 - No. 17)
If you connect a series circuit with a 10-ohm resistor, a 20-ohm resistor, and a 30-ohm resistor, what is the total resistance?
10 ohms
20 ohms
30 ohms
60 ohms
คำอธิบาย
Series resistance adds up: 10 + 20 + 30 = 60 ohms.