Question 403Electricity & Electronics - QMED

The correct answer is B) operating voltage and wattage. Incandescent lamps are rated based on their operating voltage and wattage. The voltage rating indicates the supply voltage the lamp is designed to operate at, while the wattage rating specifies the electrical power consumption of the lamp. This information is crucial for selecting the appropriate incandescent lamp for a particular application and ensuring safe and efficient operation. The other options are incorrect because they do not accurately describe how incandescent lamps are rated. Operating reactance, frequency, and impedance are not the primary factors used to rate incandescent lamps, which are typically resistive devices. Operating resistance is also not a common rating for incandescent lamps.