Q4: Which equation is for series resistors and which equation is for parallel resistors? \text { A } \quad R_{e q}=R_{1}+R_{2}+R_{3}+\cdots \text { B } \frac{1}{R_{e q}}-\frac{1}{R_{1}}+\frac{1}{R_{2}}+\frac{1}{R_{3}}+\cdots