Question
Which one of the following does not convert electrical energy into light energy?
The correct answer is
A candle
- The burning of a candle is a chemical change in which chemical energy is converted into light and heat energy.
- All other options use electrical energy and convert it into light energy. Therefore, Option 1 is the correct choice.
Some examples of energy conversion:
| Microphone | A device that converts sound waves into forms of electrical energy. |
| Loudspeaker | A device that converts electrical signals into a sound that is loud enough to be heard at a distance. |
| Solar Cell | A device that directly converts light energy into electricity through the photovoltaic effect. |
| Gramophone | A device used for recording sound and playing it back. |
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Important Questions from Work Power Energy
The energy possessed by a body due to its change in position or shape is called
A microphone converts:
Which of the following is also called the First Law of Thermodynamics?
Select the most appropriate option to fill in the blanks. A thermistor can have a region of _______ determined by the construction material or the temperature of the material. The change in temperature can be due to internal effects such as current through the thermistor or due to external effects of _____.
EMF of a thermocouple is approximately a _____ function of the temperature difference between the junctions.
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