In a parallel circuit with a 30-volt supply powering two lamps, the voltage across each lamp is:

• A. Equal to the supply voltage.
• B. Half the supply voltage.
• C. One third of the supply voltage.
• D. The same as the load's rated voltage.

Answer: (A)

In a parallel circuit, all components are connected across the same two terminals, so each branch has the same voltage as the source. Here, both lamps are directly across the 30-volt supply, so each lamp has 30 volts across it. The current through each lamp may differ based on its resistance, but the voltage is the same on every branch. If the lamps were in series, the voltage would be shared between them (for equal lamps, about half each); the idea of one third would apply only with three elements in series. The statement about the voltage matching a load’s rating isn’t a general rule; it depends on the source voltage matching the load rating.