11th Standard Syllabus & Materials
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Published on: 10/11/2020
11th Standard Physics Properties of Matter English Medium Free Online Test One Mark Questions with Answer Key 2020 - 2021
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.
The viscous force the relative motion between the adjacent layers of a fluid in motion which one of the following is absolutely fit?
opposes
never affects
facilitates
may effect under certain conditions
2.
Energy due to which molecules held at a fixed position vibrate, this energy is termed as______________.
external energy
internal energy
chemical energy
physical energy
3.
Amount of energy required to change liquid to gas and vice versa without any change in temperature is termed as __________________.
Latent Heat and Fusion
Latent Heat of Yaporis ation
Heat capacity
Specific heat capacity
4.
The CGS unit of stress is ______________.
N/m2
J/m2
dynl/cm2
N/cm2
5.
The water from a tap of diameter 1.25cm with a rate of 5\(\times\)10-5m3s-1 the density & coefficient of viscosity of water are 103 kg m-3 & 10-3 pascal the flow of water is ______________.
steady with Reynold's number 5100
turbulent with Reynold's number 5100
steady with Reynold's number 3900
turbulent with Reynold's number 3900
6.
Two capillaries of lengths L & 2L and of radius R & 2R are connected in series the net rate of flow of fluid through them will (rate of the flow through singe capillary,\(x=\pi R^{4}/8 \eta L\)) be ____________.
\(\frac{8}{9}\alpha\)
\(\frac{9}{8}\alpha\)
\(\frac{5}{7}\alpha\)
\(\frac{7}{5}\alpha\)
7.
Two drops of equal radius coalesce to form a bigger drop. What is ratio of surface energy of bigger drop to smaller one?
21/2:1
1:1
22/3:1
none of these
8.
A rectangular vessel when full of water, takes 10 min to be emptied through an orifice in its bottom, how much time will it take to be emptied when half filled with water _____________.
9 min
7 min
5 min
3 min
9.
Critical velocity of the liquid _____________.
decreases when radius decreases
increases when radius increases
decreases when density increases
increase when density increases
10.
If there were no gravity, which of the following will not be there for a fluid?
viscosity
surface tension
pressure
archimedes upward thrust
11.
Ablack body is continuously radiating measured at a temperature of 2880 k if U1 U2 and U3 are the amount of radiation measured between the wavelengths 599 & 600 nm, 999 & 1000 nm & 1499 & 1500 nm respectively then _____________ (wiresconstant b = 2.88\(\times\)1026 kmk)
U2 < U3
U1 = U2 = U3
U123
U2 >U1 >U3
12.
Water rises in a capillary tube to a certain height such that the upward force due to the surface tension is balanced by 62.84\(\times\)10-5N force due to the weight of the liquid column. If the surface tension of water is 70\(\times\)10-3Nm the radius of the capillary tube is ____________.
1.43\(\times\)10-3m
2.83\(\times\)10-3 m
1.43\(\times\)10-2 m
2.83\(\times\)10-3 m
13.
An air bubble of diameter 4 mm rises steadily i through a solution of density 1500 kgm23 at the rate of 30cm-1 the coefficient of viscosity of the solution is _____________.
3.3\(\times\)10-3 poise
2.2\(\times\)10-3 poise
3.3\(\times\)10-3 poise
4.4\(\times\)10-3 poise
14.
The wettability of a surface by a liquid depends primarily on
viscosity
surface tension
density
angle of contact between the surface and the liquid
15.
A certain number of spherical drops of a liquid of radius R coalesce to form a single drop of radius R and volume V. If T is the surface tension of the liquid, then
energy = 4 V T \(\left( \frac { 1 }{ r } -\frac { 1 }{ R } \right) \)is released
energy = 3 V T \(\left( \frac { 1 }{ r } +\frac { 1 }{ R } \right) \)is absorbed
energy = 3 V T \(\left( \frac { 1 }{ r } -\frac { 1 }{ R } \right) \)is released
energy is neither released nor absorbed
16.
17.
The young’s modulus for a perfect rigid body is
0
1
0.5
infinity
18.
Two wires are made of the same material and have the same volume. The area of cross sections of the first and the second wires are A and 2A respectively. If the length of the first wire is increased by Δl on applying a force F, how much force is needed to stretch the second wire by the same amount?
2 F
4 F
8 F
16 F
19.
For a given material, the rigidity modulus is \(\left( \frac { 1 }{ 3 } \right) \)rd of Young’s modulus. Its Poisson’s ratio is
0
0.25
0.3
0.5
20.
If a wire is stretched to double of its original length, then the strain in the wire is
1
2
3
4
1.
(a)
opposes
2.
(b)
internal energy
3.
(b)
Latent Heat of Yaporis ation
4.
(c)
dynl/cm2
5.
(b)
turbulent with Reynold's number 5100
6.
(a)
\(\frac{8}{9}\alpha\)
7.
(d)
none of these
8.
(b)
7 min
9.
(c)
decreases when density increases
10.
(d)
archimedes upward thrust
11.
(a)
U2 < U3
12.
(a)
1.43\(\times\)10-3m
13.
(d)
4.4\(\times\)10-3 poise
14.
(d)
angle of contact between the surface and the liquid
15.
\(n \times \frac{4}{3} \pi r^{3}=\frac{4}{3} \pi R^{3}\)
\(\therefore \text { Energy }=3 V T\left(\frac{1}{r}-\frac{1}{R}\right) \text { is released }\)
16.
(b)
17.
(d)
infinity
18.
\(\frac{F}{A}=Y \frac{\Delta l}{l} \quad F=Y \frac{\Delta l}{l} \times A\)
\(A_{1}=\mathrm{A} \quad \mathrm{A}_{2}=2 \mathrm{~A}\)
\(\therefore F \propto \Delta l \times A\)
\(\mathrm{F} \propto \Delta l_{1} A_{1}\)
\(\mathrm{F}_{1} \propto 2 \Delta l_{2} \times A_{2}\)
\(\frac{F}{F_{1}}=\frac{\Delta l A}{2 \Delta l \times 2 A}\)
\(\therefore F_{1}=4 \mathrm{~F}\)
19.
\(\text { Rigidity modulus }=\frac{1}{3} \times \text { Young's modulus }\)
\(\text { Poisson ratio }=\frac{\text { lateral strain }}{\text { longitudinal strain }}\)
20.
\(\text { Strain }=\frac{\text { Change in length }}{\text { Original length }}\)
\(=\frac{2 l-l}{l}=\frac{l}{l}=1\)
11th Standard Syllabus & Materials
11th Standard
TN 11th Tamil பீடு பெற நில் - செய்யுள் - காவடிச்சிந்து Important Questions And Answers Study Material - QB365 Set A
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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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