Which device converts electrical energy to light for uses such as a dashboard warning light?

Which device converts electrical energy to light for uses such as a dashboard warning light?

• A. Lighting lamp
• B. Transducer
• C. Indicator lamp
• D. Ground

Answer: (C)

When you need a light that signals a condition, the device designed to convert electrical energy into visible light for signaling is an indicator lamp. On dashboards, it lights up to alert you to a status issue, using a small bulb or LED to produce light when powered. A lighting lamp is a general light source and not specifically a status indicator. A transducer changes energy from one form to another (for example, converting a physical quantity to an electrical signal), rather than primarily emitting light for signaling. Ground is simply a reference point in a circuit and does not create light. So the indicator lamp is the best fit for a dashboard warning light.

When you need a light that signals a condition, the device designed to convert electrical energy into visible light for signaling is an indicator lamp. On dashboards, it lights up to alert you to a status issue, using a small bulb or LED to produce light when powered. A lighting lamp is a general light source and not specifically a status indicator. A transducer changes energy from one form to another (for example, converting a physical quantity to an electrical signal), rather than primarily emitting light for signaling. Ground is simply a reference point in a circuit and does not create light. So the indicator lamp is the best fit for a dashboard warning light.