Ham Radio General Class Practice Test

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What is one disadvantage of an incandescent indicator compared to an LED?

Low power consumption
High speed
Long life
High power consumption

The correct answer is: High power consumption

An incandescent indicator has the significant disadvantage of high power consumption compared to an LED. Incandescent bulbs operate by heating a filament until it glows, which requires a substantial amount of electrical energy. This process not only results in higher energy usage but also generates heat, which can contribute to additional energy loss. In contrast, LEDs are more energy-efficient as they convert a greater percentage of electrical energy into light rather than heat. This lower power consumption makes LEDs a much more effective option for many applications, including indicator lights in various electronic devices. As a result, choosing an incandescent indicator generally leads to increased operational costs and greater demand on power resources, highlighting the importance of considering power consumption when selecting lighting technologies.