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

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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
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



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
years
b) 3.1 × 10
years
c) 3.1 × 10
years
d) 3.1 × 10
years

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Physics MCQs Ebook page 2

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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
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

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Physics MCQs /Physics E book library

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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
a)Nm2
b)N2m
c)Nm-2
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
pressure?
a) Newton/Meter2
b) newton/meter2
c) Newton/meter2

d) Newton/Meter2

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