In a parallel circuit, if one branch is disconnected, what typically happens?

• A. The entire circuit ceases to operate
• B. The current in the remaining branches stays the same
• C. Voltage decreases across all branches
• D. The circuit becomes a series circuit

Answer: (B)

In a parallel circuit, disconnecting one branch does not affect the operation of the other branches, which is a fundamental characteristic of parallel circuits. Each branch operates independently; therefore, the current in the remaining branches stays the same.

In practical terms, this means that if one branch is removed or experiences a fault, the other branches still have a complete path for current to flow. As a result, the voltage across each remaining branch remains the same as it is equal to the source voltage, and the current that continues to flow in those branches is determined by their individual resistance.

This property makes parallel circuits advantageous for applications where uninterrupted operation is crucial, as it allows current to flow through alternative paths even if one path fails. The other options imply changes in circuit behavior that don't accurately reflect how a parallel circuit functions when one branch is disconnected.