Physics for IGCSE & O level - Electricity (Section 6 - No. 50)
What is the equivalent resistance of two 2-ohm resistors in parallel?
1 ohm
2 ohms
3 ohms
4 ohms
解释
In parallel, the reciprocal of the total resistance is the sum of reciprocals of individual resistances. Or, for two identical resistors, the total resistance is the value of one resistor divided by the number of resistors.