Physics for IGCSE & O level - Electricity (Section 1 - No. 12)
If two resistors are connected in parallel, and one resistor has a resistance of 10 ohms and the other has a resistance of 20 ohms, what is the total resistance?
30 ohms
6.67 ohms
10 ohms
20 ohms
คำอธิบาย
1/R_total = 1/10 + 1/20; R_total = 6.67 ohms