Welcome to the ultimate challenge for enthusiasts of physics! This multiple-choice quiz will test your knowledge of work, energy, and power concepts. Work is said to be done if force acting on a body can move it some distance from the force. The power is the time rate of doing work & the energy of an object is its capacity for doing work. Are you ready to delve into the intricacies of these fundamental principles? Let's find out!
1. What the SI unit of work?
A. Joule
B. Mole
C. Radian
D. Kilogram
2. Work is a ....
A. Vector quantity
B. Scalar quantity
C. Both of them
D. None of them
3. What is the SI unit of power?
A. Meter/sec
B. Radian
C. Second
D. Joule/sec
4. Which one is not an example of kinetic energy?
A. Wind Mills
B. Stretched Bow
C. Water Mills
D. None of them
5. What kind of energy of water in dams is used to run turbines in order to produce electric energy using the generators?
A. Kinetic energy
B. Potential Energy
C. Both of them
D. None of them
6. What kind of energy conversion takes place in an electrical heater?
A. Electric energy into heat energy
B. Electric energy into light energy
C. Chemical energy into heat energy
D. Electric energy into magnetic energy
7. In an electric bulb, the electric energy is converted into ...
A. Chemical energy
B. Heat energy
C. Light energy
D. Magnetic energy
8. What kind of energy conversion takes place in the burning of coal and oil?
A. Mechanical energy into heat energy
B. Electric energy into heat energy
C. Chemical energy into heat energy
D. Electric energy into magnetic energy
9. The total amount of energy in the universe remains....
A. Variable
B. Constant
C. Both of them
D. None of them
10. What is the formula for work?
A. Work = Force × Distance
B. Work = Mass × Acceleration
C. Work = Power × Time
D. Work = Momentum × Velocity
11. Which law of physics states that energy cannot be created or destroyed, only transformed from one form to another?
A. Law of Conservation of Energy
B. Law of Inertia
C. Law of Thermodynamics
D. Law of Gravitation
12. If an object is lifted upwards against gravity, what type of work is being done?
A. Negative work
B. Positive work
C. No work
D. Zero work
13. In which scenario is more work done: lifting a 10 kg object by 2 meters or lifting a 5 kg object by 4 meters?
A. Lifting a 10 kg object by 2 meters
B. Lifting a 5 kg object by 4 meters
C. Both scenarios require the same work
D. None of the above
14. How is power calculated?
A. Power = Work × Time
B. Power = Energy / Time
C. Power = Work / Time
D. Power = Force × Distance
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