a) Three resistors 1 Ω, 2 Ω, and 3 Ω are combined in series. What is the total resistance of the combination? b) If the combination is connected to a battery of emf 12 V and negligible internal resistance, obtain the potential drop across each resistor.
(a) Equivalent resistance is Req=R1+R2+R3=(1+2+3)Ω=6Ω (b) Current in the circuit is given by I=RE I=612=2Ω Potential drop across 1Ω, V1=IR1=2×1=2V Potential drop across 2Ω,V2=IR2=2×2=4V Potential drop across 3Ω,V3=IR3=2×3=6V
