In direct-current (DC) parallel circuit troubleshooting and analysis, changes in circuit configuration directly affect voltage, current, and equivalent resistance. Match each circuit condition or modification with its corresponding electrical effect.
- Adding an additional resistive branch in parallel to an operating circuitDecreases the overall equivalent resistance and increases the total current drawn from the source
- Opening (disconnecting) one branch in a three-branch parallel networkReduces total circuit current while voltage and current in remaining branches remain unchanged
- Connecting branches with unequal resistance values across a single DC sourceCauses branches with lower resistance to draw higher current while branch voltages remain equal
- Measuring voltage drops across different parallel branchesYields identical potential difference readings across every individual branch
Answer
Adding a parallel branch matches with decreasing overall equivalent resistance and increasing total current; opening one branch matches with reducing total current while remaining branches stay unchanged; connecting unequal branches matches with lower resistance branches drawing higher current; measuring voltage drops matches with identical potential difference readings across every branch.
In parallel DC circuits, adding a branch reduces total resistance and increases total current, opening a branch isolates only that path while others continue operating normally, current divides inversely with branch resistance under constant voltage, and voltage is identical across every parallel branch.
Step-by-Step Solution
Key Concept
Fundamental operational principles of parallel circuits: equal branch voltage, independent branch currents, and reciprocal equivalent resistance
Estimated Time:1m 0s