1. Which phenomenon is the bouncing back of light from a surface — select the correct answer.
✅ A. Reflection
Reflection is the return of light from a surface. Read more
Physics
2. For the following question, select the correct option: Which phenomenon is the bouncing back of light from a surface?
✅ C. Reflection
Reflection is the return of light from a surface. Read more
3. For the following question, select the correct option: Which quantity is measured in joules?
✅ C. Energy
The joule is the SI unit of energy and work. Read more
4. For the following question, select the correct option: Which wave requires a material medium to travel?
✅ D. Sound wave
Sound is a mechanical wave and requires a medium. Read more
5. For the following question, select the correct option: What is the formula for kinetic energy?
✅ C. ½mv²
Kinetic energy is one-half mass times velocity squared. Read more
6. For the following question, select the correct option: Which form of energy is stored in a stretched spring?
✅ B. Elastic potential energy
A stretched spring stores elastic potential energy. Read more
7. For the following question, select the correct option: What is the unit of magnetic flux density?
✅ B. Tesla
Magnetic flux density is measured in teslas. Read more
8. For the following question, select the correct option: What is the SI unit of pressure?
✅ B. Pascal
Pressure is measured in pascals. Read more
9. For the following question, select the correct option: What instrument measures potential difference?
✅ B. Voltmeter
A voltmeter measures potential difference. Read more
10. For the following question, select the correct option: Which law states that every action has an equal and opposite reaction?
✅ B. Newton's third law
Newton's third law describes action and reaction forces. Read more
11. What is Velocity of sound m/s
✅ B. 343
12. In general knowledge terms, which simple machine is a rigid bar pivoted about a fixed point?
✅ D. Lever
A lever is a rigid bar that rotates around a fulcrum. Read more
13. In general knowledge terms, what is momentum equal to?
✅ D. Mass × velocity
Linear momentum is p = mv. Read more
14. In general knowledge terms, which phenomenon explains the bending of light when it passes between media?
✅ A. Refraction
Refraction is the change in direction of light due to a change in speed between media. Read more
15. In general knowledge terms, what is frequency measured in?
✅ A. Hertz
Frequency is measured in hertz. Read more
16. In general knowledge terms, what type of lens is thicker in the middle than at the edges?
✅ B. Convex lens
A convex lens is thicker at the center and converges parallel light rays. Read more
17. In general knowledge terms, what is the unit of electrical resistance?
✅ B. Ohm
Electrical resistance is measured in ohms. Read more
18. In general knowledge terms, what is the acceleration due to gravity near Earth’s surface approximately?
✅ D. 9.8 m/s²
Near Earth's surface, gravitational acceleration is approximately 9.8 m/s². Read more
19. In general knowledge terms, what instrument measures electric current?
✅ A. Ammeter
An ammeter measures electric current. Read more
20. In general knowledge terms, what is the SI unit of pressure?
✅ B. Pascal
Pressure is measured in pascals. Read more