PMMI Industrial Electricity Practice Test

In a parallel circuit, the same voltage is across every component. All components are connected between the same two nodes, so the potential difference they experience is identical. That’s why the voltage drop across each component is the same. Currents split among the branches depending on each branch’s resistance, so the current through each component is not the same. The total resistance in parallel isn’t the sum of the resistances; instead, the reciprocals add (1/R_total = 1/R1 + 1/R2 + …), which typically lowers the overall resistance. Power isn’t the same for every component either. With the same voltage across different resistors, P = V^2/R shows that different R values draw different power. So the statement that the voltage drop across each component is the same is the true characteristic of a parallel circuit.