Topic -1
Physics
1. What is the basic reference standard to measure any physical quantity called ?- Unit
7 BASIC UNITS OF SI SYSTEM
2. What is the basic unit of length ?- Metre
3. What is the basic unit of mass ?- Kilogram
4. What is the basic unit of time ?- Second
5. What is the basic unit of electric current ?- Ampere
6. What is the basic unit of Thermodynamic temperature ?- Kelvin
7. What is the basic unit of Luminous Intensity ?- Candela
8. What is the basic unit of Amount of Substance ?- Mole
SUPPLEMENTARY UNITS
9. What is the basic unit of to assess Plane Angle ?- Radian
10. What is the basic unit to assess Solid Angle ?- Steradian
IMPORTANT DERIVED UNIT
11. What is the SI Unit of Area ?- m2
12. What is the SI Unit of Velocity ?- ms-1
13. What is the SI Unit of Force ?- kgms-2
14. What is Force ?- Mass * Acceleration
15. What is Velocity ?- Displacement per unit time
16. What is Area ?- Length * Breadth
17. What are the dimensions of the Physical Quantities ?- Mass –M , Length-L and Time-T
18. What is Force ?- MLT-2
19. What is Density ?- ML-3
20. What is a Scalar Quantity ?- A quantity that has magnitude only and no direction.
21. What is a Vector Quantity ?- Physical Quantity that have both magnitude and direction.
22. The branch of mechanics that deals with the motion of object is called _________- Kinetics
23. The length of the actual path covered by a body in a particular time interval is called ________- Distance
24. Which kind of quantity is distance ?- Scalar
25. What is unit of distance ?- Meter
26. What is the difference between the final and the initial position of an object called __________?- Displacement
27. Which kind of quantity is displacement ?- Vector
28. What is the basic unit of displacement ?- Meter
29. ________ is the distance covered by a moving body in per unit of time interval – Speed
30. What is kind of quantity is Speed ?- Scalar
31. What is the formula of Velocity ?- Displacement / Time
32. What are the features of Velocity ?
· It is a vector quantity.
· It may be positive or negative.
33. If a body is moving in a circular path then after completing one complete cycle , it average velocity is ________- Zero
34. An object is said to be moving in a __________ if it undergoes equal displacement in equal intervals of time – Uniform Velocity
35. An object is said to be moving with ______________if it undergoes unequal displacement in equal intervals of time . - Non-uniform or Variable Velocity
36. When two bodies are moving in the straight line , the speed of one with respect to another is known as its __________- Relative Velocity
37. __________ is the rate of change of velocity – Acceleration (Increase ) / Deceleration ( Negative Acceleration)
38. What is the SI unit of Acceleration ?- m/s2
39. Which kind of quantity is Acceleration ?- Vector
40. Acceleration of an object is _______ if it is at rest or moving with uniform velocity – Zero
41. When a particle is projected so that it makes certain angle with horizontal then the motion of the particle is said to be _________- Projectile. The path of projectile is parabolic.
42. When two balls of different masses are projected horizontally , they will reach ground ___________:- at same time
43. When the acceleration is directed towards centre , it is called ________- Centripetal Motion
44. ________ is the push or pull that can change the position of a body - Force
45. _________ is the pseudo force. It is always equal and opposite to centripetal force- Centrifugal Force
46. What is the First Law of Newton ?- Everybody retains its state of rest or state of uniform motion until an external force is applied on it.
47. What is the other name given to the First Law of Newton?- Law of Inertia or Law of Galileo
48. ________ is the virtue by which a thing tries to retain its state. – Inertia
49. What are the types of inertia ?
· Inertia of rest.
· Inertia of motion.
· Inertia of direction.
50. What is the second law of Newton ?- The force applied on a body is equal to the product of mass of the body and the acceleration produced in it.
F = ma