Physics Practice: Energy (Mock Test 3 - Advanced)
1. A body of mass $5 \text{ kg}$ is taken from the ground to a height of $10 \text{ m}$. If $g = 10 \text{ m/s}^2$, the potential energy gained is:
2. When a pendulum bob moves from its extreme position to its mean position, its ________ energy decreases and ________ energy increases.
3. Two bodies $A$ and $B$ have masses $m$ and $2m$ respectively. If they are moving with the same velocity, the ratio of their Kinetic Energies ($K_A : K_B$) is:
4. Which of the following is an example of conversion of light energy into chemical energy?
5. "Geothermal Energy" is energy obtained from:
6. A machine does $1000 \text{ J}$ of work in $10 \text{ seconds}$. Its power is:
7. When a firecracker explodes, chemical energy is converted into:
8. Which source of energy is also known as 'Black Gold'?
9. $1 \text{ Horsepower (hp)}$ is approximately equal to:
10. Solar panels used on satellites are primarily composed of:
11. A compressed spring has more energy than a normal spring. This energy is:
12. Which liquid is used in the "Ocean Thermal Energy Conversion" (OTEC) process to turn turbines?
13. The main disadvantage of nuclear energy is:
14. Kinetic energy of an object of mass $m$ moving with velocity $v$ is:
15. Biogas is a mixture of gases, primarily consisting of ________.
16. When an object is thrown upwards, its speed decreases. This means its ________ energy is being converted into ________ energy.
17. $1 \text{ Joule}$ is equal to ________ $erg$ (CGS unit).
18. The energy possessed by wind is used in windmills to produce:
19. In a closed system, the Total Mechanical Energy (PE + KE) always ________.
20. Which of the following is a non-polluting source of energy?