What could be the outcome of adding two bulbs to a parallel circuit?

In a parallel circuit, adding more bulbs creates additional pathways for the current to flow. This means that the overall resistance of the circuit decreases. Since voltage across each component in a parallel circuit remains constant, the total current supplied by the power source must increase to maintain that voltage.

When you add two bulbs, the total current will increase, often simplifying to the idea that it can double if the new bulbs have the same resistance as the original ones. Therefore, the correct understanding here is that the total current flowing from the power source will actually increase rather than stay the same.

The other choices reflect incorrect expectations of how a parallel circuit's behavior works. For instance, the current cannot become zero, as there are pathways for it to flow, and the voltage across the bulbs remains unchanged regardless of how many are added to the circuit. Hence, the outcome of adding two bulbs to a parallel circuit leads to an increase in current rather than a constant flow.