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Published on: 23/08/2019
Nature of Physical World and Measurement
Download Tamil Nadu 11th Standard Physics question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Physics Test1.
Universal time is based on _______________.
rotation of the earth on its own axis
earth's orbital motion around the sun
vibration of cesium atom
oscillation of quartz clock
2.
The value of one Angstrom is _______________.
1010m
10-10m
10-8m
10-15m
3.
___________ system of units was accepted by the scientists of the general conference on weights and measures.
FPS
CGS
MKS
SI
4.
The branch of physics deals with the relation between space, time and energy are _______________.
astrophysics
relativity
acoustics
atomic physics
5.
The term used to mention study of macroscopic system to microscopic constituents is _____________.
unification
macrocosm
reductionism
microcosm
6.
The angle of an object is 18.2°. What is the angular diameter of the object in radians?
36.4 rad
3.64\(\times\)10-2 rad
31.74\(\times\)10-2 rad
3.17 rad
7.
The value of 1o is ______________.
1.745\(\times\)10-2 rad
1.946\(\times\)10-11 rad
3.6 rad
3600 rad
8.
The speed of an object v = 40 ms-1. The same quantity of speed in kmh-1 is _____________.
60
160
40
144
9.
How many \(\mu\)m present in one metre?
10-6 \(\mu\)m
106 \(\mu\)m
10-3 \(\mu\)m
10-2 \(\mu\)m
10.
The dimensions of K.E. is _______________.
M2L2T-1
M1L1T1
M1L2T-2
M2L2T-2
11.
The displacement of a particle moving along x-axis with respect to times is given by x = at + bt2-ct3. The dimensions of b are ______________.
LoT-3
LoT-3
LT-2
LT-3
12.
Which of the following Statement is wrong?
Strain is a dimensionless quantity
Fundamental quantity is also called the base quantity
force = mass x acceleration
1 Solar year = 1500 days.
13.
Which device is used for measuring the mass of atoms?
Spectrograph
Fermi
Telescope
Microscope
14.
What is the value of one light year in tera metre?
9.46 \(\times\) 106Tm
9.46 \(\times\)109Tm
9.46 \(\times\) 102Tm
9.46 \(\times\) 103Tm
15.
How many AU makes one metre?
3.26 \(\times\) 1011AU
1.496 \(\times\) 1011AU
3.08 \(\times\) 1016 AU
6.684 \(\times\) 10-12AU
16.
How many light years make 1 per sec?
3.26
6.67
1.5
9.4
17.
One parallactic second is ______________
3.08 \(\times\)1016 m
1.49 \(\times\)1011 m
9.46 \(\times\) 1015 m
1.66 \(\times\) 10-27 m
18.
1 nano second is equivalent to _____________.
10-6s
10-3s
10-15s
10-9s
19.
What is the range of astronomical time scales to microscopic scales?
1015S to 10-15S
109S to 10-18S
1018S to 10-22S
1011S to 10-16S
20.
Microscopic group of Physics dealt with the study of ____________.
classical physics
statistical mechanics
fluid mechanics
quantum physics
21.
A length-scale (I) depends on the permittivity (e) of a dielectric material, Boltzmann constant (kB), the absolute temperature (T), the number per unit volume (n) of certain charged particles, and the charge (q) carried by each of the particles. Which of the following expression for I is dimensionally correct?
\(l=\sqrt{{{nq^2}\over{\epsilon {k}_{B}T}}}\)
\(l=\sqrt{{{\epsilon {k}_{B}T}\over{nq^2}}}\)
\(l=\sqrt{{{q^2}\over{e{n}^{{{2}\over{3}}}{k}_{B}}T}}\)
\(l=\sqrt{{{q^2}\over{\epsilon n{k}_{B}T}}}\)
22.
The density of a material in CGS system of units is 4 g cm-3. In a system of units in which unit of length is 10 cm and unit of mass is 100 g, then the value of density of material will be
0.04
0.4
40
400
23.
The dimensional formula of Planck's constant h is
[ML2T-1]
[ML2T3]
[MLT-1]
[ML3T-3]
24.
If \(\pi=3.14,\) then the value of \({\pi}^{2}\) is
9.8596
9.860
9.86
9.9
25.
One of the combinations from the fundamental physical constants is \({{hc}\over{G}},\) The unit of this expression is
Kg2
m3
S-1
m
1.
(c)
vibration of cesium atom
2.
(b)
10-10m
3.
(d)
SI
4.
(b)
relativity
5.
(c)
reductionism
6.
(c)
31.74\(\times\)10-2 rad
7.
(a)
1.745\(\times\)10-2 rad
8.
(d)
144
9.
(b)
106 \(\mu\)m
10.
(c)
M1L2T-2
11.
(c)
LT-2
12.
(d)
1 Solar year = 1500 days.
13.
(a)
Spectrograph
14.
(d)
9.46 \(\times\) 103Tm
15.
(d)
6.684 \(\times\) 10-12AU
16.
(a)
3.26
17.
(a)
3.08 \(\times\)1016 m
18.
(d)
10-9s
19.
(c)
1018S to 10-22S
20.
(d)
quantum physics
21.
\(\text {Dimension of permittivity } \varepsilon=A^{2} C^{2} N^{-1} m^{-2}\)
\(\text {Dimension of Boltzmann constant } k_{B}=\left[\mathrm{ML}^{2} \mathrm{~T}^{-2} \mathrm{~K}^{-1}\right]\)
\(\text {Dimension of Absolute Temperature }=T\)
No. of charged particles per unit
Volume = No. of dimensions = a
Dimension of charge = AT
Dimension of length = L
\(\text { Dimension of }=\frac{\sqrt{\varepsilon k_{B} T}}{n q^{2}}\)
\(=\frac{\sqrt{\left[\mathrm{A}^{2} \mathrm{C}^{2} \mathrm{~N}^{-1} \mathrm{~m}^{-2}\right]}\left[\mathrm{ML}^{2} \mathrm{~T}^{-2} \mathrm{~K}^{-1}\right][\mathrm{T}]}{[\mathrm{AT}]^{2}}\)
\(=\sqrt{L^{2}}=L\)
\(\therefore \text { Dimension of length }=\mathrm{L}\)
22.
(c)
40
23.
Dimensional formula of Planck's
\(\text { constant }=\frac{\text { Energy }}{\text { Frequency }}=\frac{\mathrm{ML}^{2} \mathrm{~T}^{-2}}{\mathrm{~T}^{-1}}\)
\(=M L^{2} T^{-2+1}=M L^{2} T^{-1}\)
24.
\(\pi=3.14 \)
\(\pi^{2} =3.14 \times 3.14 \)
\(=9.8596=9.86 \)
25.
Unit of a (Planck's constant) - Js
Unit of c (Velocity of light) - ms-1
Unit of G (Gravitational Constant) - \(\frac{\mathrm{Nm}^{2}}{\mathrm{Kg}^{2}}\)
\(\therefore \text { Unit of } \frac{h c}{G} \text { is }=\frac{J s \times m s^{-1}}{N m^{2} / k g^{2}} \)
\(=\frac{N m s \times m s^{-1} \times k g^{2}}{N m^{2}}[J=N m] =\mathrm{kg}^{2}\)
11th Standard Syllabus & Materials
11th Standard
TN 11th Tamil பீடு பெற நில் - செய்யுள் - காவடிச்சிந்து Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
TN 11th Tamil பீடு பெற நில் - உரைநடை - மலை இடப்பெயர்கள் : ஓர் ஆய்வு Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
TN 11th Tamil மாமழை போற்றுதும் - துணைப்பாடம் - யானை டாக்டர் Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
TN 11th Tamil மாமழை போற்றுதும் - செய்யுள் - ஐங்குறுநூறு Important Questions And Answers Study Material - QB365 Set A
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