Physics Practice: Work, Power and Energy (Mock Test 2 - Intermediate)
1. A body of mass $m$ is moving with velocity $v$. If its mass is doubled and velocity is halved, its new Kinetic Energy will be:
2. Which of the following is the correct expression for the relationship between Power ($P$), Force ($F$) and Velocity ($v$)?
3. When a winding spring of a watch is released, the ______ energy is converted into ______ energy.
4. A crane lifts a mass of $100 \text{ kg}$ to a height of $10 \text{ m}$ in $20 \text{ s}$. The power consumed is: (Take $g = 10 \text{ m/s}^2$)
5. No work is done by a force if the angle between the force and displacement is:
6. A compressed spring has more energy than an uncompressed spring. This energy is:
7. The unit $1 \text{ eV}$ (electron-volt) is used to measure:
8. A ball is thrown vertically upwards. Its potential energy is maximum at:
9. $1 \text{ calorie}$ is approximately equal to:
10. In a hydroelectric power plant, the sequence of energy conversion is:
11. A machine of power $2 \text{ kW}$ operates for $1 \text{ hour}$. The energy consumed is:
12. Solar cells are made of which type of material?
13. When a satellite moves around the Earth in a circular orbit, work done by gravity is zero because:
14. In a loud speaker, energy transformation is:
15. A body at a certain height $h$ has $100 \text{ J}$ of potential energy. If it falls to $h/4$, its potential energy will be:
16. The relationship between Joule and Erg is:
17. Which of the following is an example of an inelastic collision?
18. The energy released during nuclear fission is due to:
19. A girl of mass $40 \text{ kg}$ climbs up a flight of $30$ steps each $20 \text{ cm}$ high. The work done by her is: ($g = 10 \text{ m/s}^2$)
20. In an oscillation of a simple pendulum, the kinetic energy is maximum at:
