"Conventional" sources of energy do not include which of the following options?
- Electricity
- Cowdung cake
- Tidal power
- Solar power
- Firewood
Answer & explanation
Correct answer: option 3
The correct answer is Option 3: C and D only
Both commercial and non-commercial sources of energy are known as conventional sources of energy. While commercial sources of energy are generally exhaustible (with the exception of hydropower), non-commercial sources or traditional are generally renewable.
Commercial sources are coal, petroleum and electricity as they are bought and sold. Non-commercial sources of energy are fuelwood, agricultural waste, and dried dung. These are non- commercial as they are not available in the market on a large scale.
There are three other sources of energy which are commonly termed as non-conventional sources — solar energy, wind energy and tidal power.