Energy is fundamental to all processes in the universe. Let’s test our understanding of various sources of energy with these MCQs.Each question is complemented by the correct answer and a concise explanation.
1. Which of the following is a non-renewable source of energy?
Answer:
Explanation:
Coal is a fossil fuel and is considered non-renewable because it takes millions of years to form.
2. The main disadvantage of solar energy is that:
Answer:
Explanation:
Solar energy is dependent on sunlight, and thus cannot be harnessed during nighttime or cloudy days.
3. Bio-gas mainly consists of:
Answer:
Explanation:
Biogas primarily consists of methane, with some carbon dioxide and other gases.
4. Which of these is the most energy-efficient source?
Answer:
Explanation:
Hydroelectric power has a high efficiency as converting the potential energy of water to electricity has minimal losses.
5. Geothermal energy originates from:
Answer:
Explanation:
Geothermal energy harnesses the heat from beneath the Earth’s crust.
6. The energy produced by the atomic nucleus is called:
Answer:
Explanation:
Nuclear energy is derived from processes that release energy from atomic nuclei, like fission or fusion.
7. Which of the following is NOT a greenhouse gas?
Answer:
Explanation:
Nitrogen is not a greenhouse gas. It doesn’t absorb and emit radiation within the thermal infrared range as greenhouse gases do.
8. Wind energy is mainly converted into:
Answer:
Explanation:
Wind turbines convert kinetic energy from the wind into electrical energy.
9. Tidal energy is a result of:
Answer:
Explanation:
Tidal energy is harnessed from the rise and fall of sea levels, primarily caused by the moon’s gravitational influence.
10. Which of these fuels releases the least pollutants?
Answer:
Explanation:
Natural gas burns more cleanly compared to coal, diesel, and wood, emitting fewer pollutants.
11. Hydrogen, if used as a fuel, will produce _______ as the main product.
Answer:
Explanation:
When hydrogen burns, it combines with oxygen to produce water.
12. The energy stored in the nucleus of an atom is due to:
Answer:
Explanation:
The strong nuclear force between neutrons and protons in the nucleus is responsible for the energy stored in it.
13. In a hydroelectric power plant, potential energy of water is primarily converted into:
Answer:
Explanation:
In hydroelectric plants, the potential energy of water stored at a height is first converted into kinetic energy as it falls, which drives turbines, converting it into electrical energy.
14. Which of the following sources of energy is the most sustainable?
Answer:
Explanation:
Solar energy is abundant, renewable, and causes minimal environmental impact, making it the most sustainable.
15. Fusion reactions are responsible for the energy produced by:
Answer:
Explanation:
The Sun, and other stars, produce energy primarily through nuclear fusion reactions.