Discussion
Which of the following is a time dependent energy resource and has good potential to reduce dependence on conventional fuels?
Answer: A
The key's answer is Solar energy.
Solar energy is available only in daylight and varies with the hour, the season and cloud cover, so it is described as a time-dependent resource; storage or backup is needed to use it round the clock. At the same time it is abundant, especially in a state like Rajasthan, and can replace diesel and coal for heating, drying, pumping and power, which gives it a large potential to reduce dependence on conventional fuels.
Wind and tidal energy also vary with time, but over smaller and more site-specific areas. Biomass can be stored and used when needed, so it is not time-dependent in the same way.
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