11th Standard Syllabus & Materials
11th Standard
TN 11th Tamil இயற்கை வேளாண்மை,சுற்றுச்சூழல் -செய்யுள் - மனோன்மணீயம் Important Questions And Answers Study Material - QB365 Set A
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TN 11th Tamil பீடு பெற நில் - துணைப்பாடம் - வாடிவாசல் Important Questions And Answers Study Material - QB365 Set A
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Published on: 10/11/2020
11th Standard Physics Properties of Matter English Medium Free Online Test One Mark Questions 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.
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
2.
Internal energy comprises of two types of energies, those are ________________.
mechanical and electrical energy
magnetic and electrical energy
kinetic and potential energy
kinetic and magnetic energy
3.
The CGS unit of stress is ______________.
N/m2
J/m2
dynl/cm2
N/cm2
4.
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
5.
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 ____________.
\(\frac{8}{9}\alpha\)
\(\frac{9}{8}\alpha\)
\(\frac{5}{7}\alpha\)
\(\frac{7}{5}\alpha\)
6.
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
7.
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
8.
Critical velocity of the liquid _____________.
decreases when radius decreases
increases when radius increases
decreases when density increases
increase when density increases
9.
If there were no gravity, which of the following will not be there for a fluid?
viscosity
surface tension
pressure
archimedes upward thrust
10.
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
U1
U2 >U1 >U3
11.
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
12.
Two metal wires of identical dimensions are connected in series if σ1 and σ2 are the conductivity of the metal wire respectively, the effective conductivity of the combination is ______________.
\(\frac{\sigma_{1}+\sigma_{2}}{2\sigma_{1}\sigma_{2}}\)
\(\frac{\sigma_{1}+\sigma_{2}}{\sigma_{1}\sigma_{2}}\)
\(\frac{\sigma_{1}\sigma_{2}}{(\sigma_{1}+\sigma_{2})}\)
\(\frac{2\sigma_{1}\sigma_{2}}{\sigma_{1}+\sigma_{2}}\)
13.
Steam at 100°C is passed into 20g of water at 10°C when water acquires a temp of 80°C, the mass of water present will be ____________ (take specifies heat of water 1 cal g-t c-1 & latent heat of steam = 540 cal g-1C-1)
42.5 g
22.5g
24g
31.5g
14.
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
15.
The wettability of a surface by a liquid depends primarily on
viscosity
surface tension
density
angle of contact between the surface and the liquid
16.
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
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.
(b)
Latent Heat of Yaporis ation
2.
(c)
kinetic and potential energy
3.
(c)
dynl/cm2
4.
(b)
turbulent with Reynold's number 5100
5.
(a)
\(\frac{8}{9}\alpha\)
6.
(d)
none of these
7.
(b)
7 min
8.
(c)
decreases when density increases
9.
(d)
archimedes upward thrust
10.
(a)
U2 < U3
11.
(a)
1.43\(\times\)10-3m
12.
(b)
\(\frac{\sigma_{1}+\sigma_{2}}{\sigma_{1}\sigma_{2}}\)
13.
(b)
22.5g
14.
(d)
4.4\(\times\)10-3 poise
15.
(d)
angle of contact between the surface and the liquid
16.
\(n \times \frac{4}{3} \pi r^{3}=\frac{4}{3} \pi R^{3}\)
\(\therefore \text { Energy }=3 V T\left(\frac{1}{r}-\frac{1}{R}\right) \text { is released }\)
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
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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