Which of the following gives the equivalent resistance of three resistors connected…

PHYSICS · Single correct · A Level · Physics · Electricity · Electricity

Problem

Which of the following gives the equivalent resistance ReqR_{\text{eq}} of three resistors R1, R2, R3R_1,\,R_2,\,R_3 connected in series? (a) Req=R1+R2+R33\displaystyle R_{\text{eq}} = \frac{R_1+R_2+R_3}{3} (b) Req=(1R1+1R2+1R3)−1\displaystyle R_{\text{eq}} = \left( \frac{1}{R_1}+\frac{1}{R_2}+\frac{1}{R_3} \right)^{-1} (c) Req=R1+R2+R3\displaystyle R_{\text{eq}} = R_1 + R_2 + R_3 (d) Req=1R1+1R2+1R3\displaystyle R_{\text{eq}} = \frac{1}{R_1}+\frac{1}{R_2}+\frac{1}{R_3}

Related theory

Browse the problem library