1. Which is a vector quantity?
Answer- Having direction and magnitude
2. What are the examples of vector ?
Answer- Displacement, Force
3. What type of energy is stored in a spring of watch?
Answer- Potential energy
4. The working of rocket is based on which Newton law of motion ?
Answer- Third law of motion
5. What is the rotational analogue of mass in linear motion ?
Answer- Moment of inertia
6. What is the minimum escape velocity of a rocket to be launched from Earth to Space ?
Answer- 11.2 km/sec
7. What is the young modulus of perfectly rigid body ?
Answer- Infinity
8. Which is the good conductor of electricity?
Answer- Graphite
9. What is the principle of Fibre optical communication?
Answer- Total internal relection
10. What is the frequency of a direct current?
Answer- Zero
11. Curie is a unit of ?
Answer- Radioactivity
12. What is the unit of relative density ?
Answer- No unit
13. Which wave cannot be polarized?
Answer- Sound wave
14. Which is the fourth state of matter ?
Answer- Plasma
15. Which is the force that causes objects to float ?
Answer- Buoyancy
16. What is used to locate submerged objects ?
Answer- Sonar
17. Which device is used to convert AC to DC ?
Answer- Rectifier
18. Which is the measure of sound level?
Answer- Decibel
19. Acceleration is inversely proportional to what ?
Answer- Mass
20. What is the principle behind hydraulic brakes used in automobiles ?
Answer- Pascal law
Answer- Having direction and magnitude
2. What are the examples of vector ?
Answer- Displacement, Force
3. What type of energy is stored in a spring of watch?
Answer- Potential energy
4. The working of rocket is based on which Newton law of motion ?
Answer- Third law of motion
5. What is the rotational analogue of mass in linear motion ?
Answer- Moment of inertia
6. What is the minimum escape velocity of a rocket to be launched from Earth to Space ?
Answer- 11.2 km/sec
7. What is the young modulus of perfectly rigid body ?
Answer- Infinity
8. Which is the good conductor of electricity?
Answer- Graphite
9. What is the principle of Fibre optical communication?
Answer- Total internal relection
10. What is the frequency of a direct current?
Answer- Zero
11. Curie is a unit of ?
Answer- Radioactivity
12. What is the unit of relative density ?
Answer- No unit
13. Which wave cannot be polarized?
Answer- Sound wave
14. Which is the fourth state of matter ?
Answer- Plasma
15. Which is the force that causes objects to float ?
Answer- Buoyancy
16. What is used to locate submerged objects ?
Answer- Sonar
17. Which device is used to convert AC to DC ?
Answer- Rectifier
18. Which is the measure of sound level?
Answer- Decibel
19. Acceleration is inversely proportional to what ?
Answer- Mass
20. What is the principle behind hydraulic brakes used in automobiles ?
Answer- Pascal law