General Science
1 Who is the father of Modern Physics
Ans: Galileo Galilei
2 . The chosen standard used tor measuring a physical
quantity
is called
Ans : Unit
3. The MKS (Meter Kilogram Second) system and CGS
(Centimeter Gram Second) system are called
Ans: Metric or decimal system
4: CGS system is also called -
Ans: Gaussian system
5 The first country to adopt metric system was-
Ans: France
6.The FPS (Foot Pound Second) system is also called
Ans: British system
7.The fundamental units in SI system, are the same as that
of-
Ans: M.K.S units
8. Number of basic SI units are -
Ans: 7
9.What is the Sl unit of Length-
Ans: Meter
10.What is the SI unit of Mass-
Ans: Kilogram
11.What is the SI unit of time-
Ans: Second
12.What is the SI unit of Electric Current
Ans: Ampere
13. What is the SI Unit of Thermodynamic temperature
Ans: Kelvin
14. What is the SI unit of Luminous intensity
Ans: Candela
15. What is the Sl unit of Amount of substance-
Ans: Mole
16. Number of suPplementary Sl units are-
Ans: 2
17. What is the SI unit ot Plane Angle -
Ans: Radian
18. What is the SI unit of Solid Angle -
Ans: Steradian
19. Physical quantities which have magnitude only and no
direction ?
Ans: Scalar Quantity
20. Give some examples of Scalar quantities
Ans: Distance, Mass, Speed, Volume, Work, Time, Power,
Energy, lressure etc.
21.Physical quantities which have both magnitude and
direction, and which obey the triangular law of addition are called -
Ans: Vector quantities
22. Give some examples of vector quantiies
Ans: Displacement, Velocity, Acceleration, Force, Momentum,
Weight, Torque, electric Current density etc.
23.The study of motion of object is called -
Ans: Kinematics
24.The total length of the path travelled by a body ina
particular time interval is called
Ans: Distance
25. What is the SI unit of Distance
Ans: Meter
26.he change in position of the body of a certain direction
is known as
Ans: Displacement
27. What is the SI unit of Displacement -
Ans: Meter
28. The rate of change of position of the object in any
direction is called.
Ans: Speed of the Object
29. The rate of change of displacement of a body is called
Ans: Velocity
30. bus covers the first half of a certain distance with
speed V, and the second half with a speed V2 The average speed during the whole
journey iss -
Ans: 2 V, V/V+V,
31. A bus travels for a certaln time. Its speed during the
first half time is V, and that during the second half time is V, The average
speed during the whole journey is -
Ans: V,+ V/2
32. If a body 1s moving on a Circular path, then after
completing one complete cycle, its average Velocity is -
Ans: Zero
33. If an object covers equal displacement in equal
intervals of time is called -
Ans: Uniform Velocity
34. If an object covers unequal displacement in equal
intervals of time is called -
Ans: Non-uniform Velocity
33. he ratio of the total displacement to the total time
taken is called
Ans: Average Velocity
34. The rate of change of Velocity of a body is called as -
Ans: Acceleration
35. What is the SI unit of acceleration
Ans: M/S²
36. The rate of change of Velocity of a body is called as -
Ans: Acceleration
37. What is the SI unit of acceleration
Ans: M/S²₆₆
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