Parallellkoblede

Parallellkoblede refers to components in an electrical circuit that are connected in parallel, meaning they share the same two nodes and therefore experience the same voltage. In a parallel connection the voltage across each component is identical, while the currents through the components add to the total current drawn from the source. This configuration is common in household wiring and many electronic devices because it allows independent operation and easy expansion.

For resistors in parallel, the equivalent resistance R_eq is given by 1/R_eq = sum_i 1/R_i. The total current is I = sum_i V/R_i, where V is the common voltage. Adding more parallel branches lowers the equivalent resistance and increases total current, assuming the supply voltage remains constant.

Capacitors connected in parallel share the same voltage, and the total capacitance is Ceq = sum_i C_i. Inductors in parallel follow 1/L_eq = sum_i 1/L_i.

In practice, the behavior of parallellkoblede circuits depends on the source and impedances. For AC signals, impedances replace pure resistances, and phase angles matter. Real voltage sources have internal resistance, which affects how current splits among branches. If one parallel branch fails open, others remain powered; if a branch shorts, it can draw large current and affect the rest, so protection and balancing are important.

Common examples include lights wired in parallel across mains, solar panels connected in parallel to increase current, and batteries connected in parallel to increase capacity while keeping a fixed voltage. When combining sources or storage units, care is needed to avoid circulating currents and ensure safe operation.