Monday, 29 April 2019

Physics MCQs E book page 4

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        c

Physics MCQs Ebook page 3

Pages: 1 |    2 |    3 |    4

The Answer key for MCQs from 1 to 57 is at page 4

41. An accurate measurement is one which has less
a) Precision
b) Absolute uncertainty
c) Fractional uncertainity
d) None

42. If= 10.5 ± 0.1and= 26.8 ± 0.1,then=is given as:
a) 16.3 ± 0.1
b) 16.3 ± 0.2
c) 16.1 ± 0
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
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

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

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
b) MLT-2
c) ML-1T
d) ML-1T2

53.T-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

56. The dimensions of stain are
a) [MLT2]
b) [ML-2T]
c) [Mo Lo To]
d) [M-1L-1T-1]

57. How many years in one second?
a) 3.1 × 10
b) 3.1 × 10
c) 3.1 × 10
d) 3.1 × 10

Physics MCQs Ebook page 2

Pages: 1 |    2 |    3 |    4

The Answer key for MCQs from 1 to 57 is at page 4

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

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
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
a) Multiplication
b) Division
c) Subtraction

d) None

Physics MCQs /Physics E book library

Pages: 1 |    2 |    3 |    4

The Answer key for MCQs from 1 to 57 is at page 4

1. The branch of physics which deals with the ultimateparticles 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

9. An example of derived unit 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

11. An alternate unit to kgms is
a) Js
b) Ns
c) Nm
d) N

12. The SI units of pressure in terms of base units are
a)kgm1 s2
b)kgm1 s3
c)kgm    s2
d)kgm2  s2

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
d)N-2 m

18. Which is a derived unit:
a) Candela
b) Ampere
c) Kelvin
d) Newton

19. The unit of force is________ and its symbol is
_______ 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
a) Newton/Meter2
b) newton/meter2
c) Newton/meter2

d) Newton/Meter2

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