CHAPTER # 1: MEASUREMENTS 1. The branch of physics which deals with the ultimate particles of which the matter is composed...
CHAPTER # 1: MEASUREMENTS
1. The branch
of physics which deals with the ultimate particles of which the matter is
composed is:
a) Plasma
physics b) Atomic physics c) Nuclear physics d) Particle physics
2. The branch of physics which deals with atomic
nuclei is called
a) Acoustics
b)
Thermodynamics c) Magnetism
d)
Nuclear physics
3. Silicon is abundantly obtained from:
a) Water b)
Metal c) Sand d) Stones
4. The number of base units are:
a)
Three b) Five
c)
Seven
d) Nine
5. Which of the following is a derived
quantity:
a)
Force b) Mass
c)
Length d) Time
6. Which of the following is SI base unit?
a)
gram b) slug
c)
Newton
d) kilogram
7. Which one of the following is not a unit of
length:
a) Angstrom b)
Micron
c)
Radian
d)
Light year
8. Which is not a base unit in SI units?
a)
Kilogram b) Joule
c)
Ampere d) Kelvin
11. An alternate unit to is
a) Js b)
Ns c) Nm d) N
12.
The SI units of pressure in terms of base units are a)
b) c) d)
13.
The SI unit of plane angle is a)
Steradian
b) Radian
c) Degree d) Candela
14. Steradian is the angel which lies in:
a) One dimension b) Two dimensions c) Three dimensions d) None
15.
The SI unit of the solid angle is a)
Degree
b) Steradian
c)
Revolution d) Radian
16. The solid
angle subtended at the center of sphere by an area of its surface equal to the
square of radius of the sphere is called:
a) Degree
b) Radian c) Minute
d) Steradian
17.
SI unit of pressure is a)
b) c) d)
18. Which is a derived unit:
a) Candela b)
Ampere c) Kelvin d) Newton
9. An example of derived unit
is
19. The unit
of force is
and its
symbol is
a) Candela b)
Ampere c) Coulomb d) Mole
10.
Candela is the SI unit of a)
Charge
b)
Luminous intensity c) Power
d) Refractive index
which is the
correct pair?
a) Newton, n b) Newton, N c) newton, n d) newton, N
20. Which one is the correct representation of
the unit of pressure?
a)
Newton/Meter2 b)
newton/meter2 c)
Newton/meter2 d)
Newton/Meter2
21. Which of the following is
least multiple:
a) Pico
b)
Femto c) Nano
d)
Atto
22. Which one is the highest power multiple?
a) giga b)
mega c) kilo d) deca
23.
The prefix pico is equal to a) 10
b) 10 c) 10 d)
10
24. The SI unit of intensity of light is:
a) Mole b)
Kelvin c) Candela d) Ampere
25. 0.0023 can be expressed in scientific
notation as:
a) 23 × 10
b) 0.23 × 10 c) 2.3 × 10 d) None
26. 1024 can be written in scientific notation as
a) 1.024x 103
b) 210
c)
0.000976 d) 1/0300097
27. Error
occurs due to negligence and inexperience of a person is:
a)
Systematic Error b) Random Error
c)
Personal Error
d) None
28.
Error in measurement may occur due to a) Inexperience of a person
b)
The faulty apparatus c)
Inappropriate method
d)
Due to all reasons in a, b and c
29. In any measurement the significant figures are
a) All accurately known and all doubtful digits
b) Only accurately known digits
c)
Only doubtful digits
d) All accurately know digits and the first
doubtful digit
30. Number of significant figures in 0.0173 are:
a) Three b) Four c)
Five d) Two
31. A student added three figures 72.1, 3.32 and
0.003.
The
correct answer regarding
the rules of
the addition of the significant figures will be
a)
75.423 b) 75.42 c) 75.4
d)
75
32. If the
reading is taken with measuring scale whose minimum division is 1mm, then the
correct reading is:
a) 0.2145 m b) 0.21 m
c)
0.214 m d) None
33. 75.560 is round off as:
a) 75.6 b) 75.7 c) 76.00 d) None
34. Zero to the right of non-zero digits are:
a) Significant
b) Not significant
c)
May or may not be significant d)
None
35. What
is the number
of significant figures
in the measurement recorded as 8.70 × 10 ?
a) 1 b) 3 c)
4 d) 7
36. Zero is not significant only if it
a)
Lies to the left of a significant digit b) is between two digits
c)
is to the right of a significant digit
d) is before the decimal point
37.
Significant figures in 0.000846 are a)
Six
b) Four c)
Seven d) Three
38. The
sum of the three
numbers, 2.7543, 4.10
and
1.273,
up to correct decimal places is
a) 8.1 b)
8.13
c)
8.1273 d) 8.127
39. 73.650
rounded off up to one decimal is a)
73.6
b)
73.7
c)
74.00 d) 73.65
40.
Absolute uncertainties are
added in following operations:
a)
Multiplication b) Division
c)
Subtraction
d) None
41. An accurate measurement is one which has less
a) Precision
b)
Absolute uncertainty
c)
Fractional uncertainity d) None
42.
If = 10.5 ± 0.1 and = 26.8 ± 0.1 , then =
− is given as:
a) 16.3 ± 0.1
51.
Unit of G is ?
a)
Nm2 kg2 b)
N m2 kg c) N m2 kg-2 d)
None
52. The dimension of force is
a) MLT-1
-2
b) 16.3 ± 0.2
c) 16.1 ± 0
b) MLT
c) ML-1T
-1 2
d) 16.3 ± 0
43. Smaller
is the least count of the instrument, more is the measurement:
a) Accurate b)
Precise
c)
Accurate and precise d) None of
these
44. Which is
a correct record
for the diameter
of wire when measured my a screw
gauge of least count 0.001 cm:
a) 2.3 cm b)
2.31 cm c) 2.312 cm
d)
2.3124 cm
45. Which
one of the
following is not regarded
as a fundamental quantity in
Physics?
a) Length b)
Mass
c)
Time
d) Weight
46. The dimensions of torque are:
d)
ML T
53.
ML-1T-2 is the dimension of a) Force
b)
Pressure
c)
Momentum d) Energy
54. A light
year is a unit for a) Time
b)
Distance
c)
Velocity
d) Time period
55. The dimensional formula for the
quantity light year is:
a) [ ]
b)
[ ]
c)
[ ]
d)
[ ]
56. The dimensions of stain are a) [MLT2]
b) [ML-2T]
c) [Mo Lo To]
-1 -1 -1
a) [ ] b) [ ] c) [ ] d) [ ]
47. Dimensions for acceleration due to
gravity is a) [ ]
b) [ ]
c) [ ]
d) [ ]
48.
As = 6 , the dimension
of coefficient of viscosity is
a)
[ ]
b) [ ]
c) [ ]
d) [ ]
49. [ ] refers to quantity a)
Velocity
b)
Time period c) Frequency
d) Force
50.
The dimension of the following pair is not the same
a)
work & energy b) work and
torque
c) Momentum & impulse
d) Mass & moment of inertia
d)
[M L T ]
57. How many years in one
second?
a) 3.1 × 10 years b) 3.1 × 10 years c) 3.1 × 10 years d) 3.1 × 10 years
Q. No.
Ans. Q. No. Ans. Q. No. Ans.
1 d 20 b 39 a
2 d 21 d 40 c
3 c 22 a 41 c
4 c 23 b 42 b
5 a 24 c 43 b
6 d 25 c 44 c
7 c 26 a 45 d
8 b 27 c 46 c
9
c 28 d 47 d
10 b 29 d 48 a
11 b 30 a 49 c
12 a 31 c 50 d
13 b 32 c 51 c
14 c 33 a 52 b
15 b 34 a 53 b
16 d 35 b 54 b
17 c 36 a 55 d
18 d 37 d 56 c
19 d 38 b 57
COMMENTS