11th Standard Syllabus & Materials
11th Standard
TN 11th Tamil இயற்கை வேளாண்மை,சுற்றுச்சூழல் -செய்யுள் - மனோன்மணீயம் Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
TN 11th Tamil என்னுயிர் என்பேன் -துணைப்பாடம் - இசைத்தமிழர் இருவர் Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
TN 11th Tamil மொழி கலை -செய்யுள் - ஒவ்வொரு புல்லையும் Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
TN 11th Tamil பீடு பெற நில் - இலக்கணம் - பகுபத உறுப்புகள் Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
TN 11th Tamil பீடு பெற நில் - துணைப்பாடம் - வாடிவாசல் Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
TN 11th Tamil பீடு பெற நில் - செய்யுள் - குறுந்தொகை Important Questions And Answers Study Material - QB365 Set A
Published on: 10/11/2020
11th Standard Physics Motion of System of Particles and Rigid Bodies 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.
M.I. of an object does not depend upon ______________.
Mass of object
Angular velocity
Mass distribution
Axis of rotation
2.
Analogue of mass in rotational motion is ___________.
M.l.
Angular momentum
Gyration
Torque
3.
If a solid sphere and solid cylinder of same mass and radius rotate about their own axis the M.I. will be greater for _______________.
Solid sphere
Solid cylinder
Both (a) and (b)
Equal both
4.
Two rings of radius R & nR made from the same wire have the ratio of moments of inertia about an axis passing through their centre equal to 1 : 8. The value of n is
2
2\(\sqrt{2}\)
4
1/2
5.
A sphere rolls down an inclined plane of inclination \(\theta\). What is the acceleration as the sphere reaches bottom?
5/7 sin\(\theta\)
3/5 sin \(\theta\)
2/6 g sin \(\theta\)
2/5 g sin \(\theta\)
6.
A sphere of radius r is rolling without sliding. What is ratio of rotational K.E and total K.E associated with the sphere?
2/5
2/7
1
1/2
7.
The M.I of a uniform circular disc is maximum about an axis perpendicular to the disc and passing through _____________.
B
D
A
C
8.
The direction of angular velocity vector is along _______________.
The tangent to the circular path
The outward radius
The inward radius
The axis of rotation
9.
Three identical spherical shells, each of mass m and radius r are placed as shown in figure. Consider an axis xx1 which is touching to two shells and passing through diameter of third shell. M.I of the system consisting of these three spherical shells about xx1 axis is ________________.
3mr2
4mr2
16/5mr2
11/5 mr2
10.
Consider a system of two identical particles. One is at rest and the other has an acceleration \(\overrightarrow { a } \). The centre of mass has an acceleration ______________.
1/2\(\overrightarrow { a } \)
\(\overrightarrow { a } \)
2\(\overrightarrow { a } \)
Zero
11.
If I, \(\alpha \) and \(\tau \) are MI, angular acceleration and torque respectively of a body rotating about any axis with angular velocity \(\omega \), then _____________.
\(\tau =I\omega \)
\(\tau =I\alpha \)
\(\alpha =r\omega \)
\(\alpha =r\omega \)
12.
Two objects which are initially at rest, move towards each other under the action of their internal attraction. If their speeds are 4v and 2v at any instant, then the speed of centre of mass of the system will be ________________.
2v
zero
V
1.5 v
13.
Where will be the centre of mass on combining two masses m and M (M > m)?
Towards m
Towards M
Between m & M
away from m & M
14.
A round object of mass M and radius R rolls down without slipping along an inclined plane. The frictional force,
dissipates kinetic energy as heat
decreases the rotational motion
decreases the rotational and transnational motion
converts transnational energy into rotational energy
15.
The speed of a solid sphere after rolling down from rest without sliding on an inclined plane of vertical height h is,
\( \sqrt \frac{4}{3}gh\)
\( \sqrt \frac{10}{7}gh\)
\(\sqrt{2gh}\)
\( \sqrt \frac{1}{2}gh\)
16.
From a disc of radius R a mass M, a circular hole of diameter R, whose rim passes through the center is cut. What is the moment of inertia of the remaining part of the disc about a perpendicular axis passing through it
15MR2/32
13MR2/32
11MR2/32
9MR2/32
17.
A particle is moving with a constant velocity along a line parallel to positive X-axis. The magnitude of its angular momentum with respect to the origin is
zero
increasing with x
decreasing with x
remaining constant
18.
If earth suddenly contracts to 0.75 times of its present radius, then the length of the day becomes _______________
12 hr
18 hr
15.5 hr
13.5 hr
19.
The angular momentum of a system of particles is conserved _____________.
When no external force acts upon the system
When no external torque acts upon the system
When no external impulse acts upon the system
When axis of rotation remains same
20.
The center of mass of a system of particles does not depend upon,
position of particles
relative distance between particles
masses of particles
force acting on particle
1.
(b)
Angular velocity
2.
(a)
M.l.
3.
(b)
Solid cylinder
4.
The moment of inertia (I) of circular ring whose axis of rotation is passing through its center, \(\mathrm{I}_{1}=\mathrm{m}_{2} \mathrm{R}^{2} . \text { Also } \mathrm{I}_{2}=\mathrm{m}_{2}(\mathrm{n} \mathrm{R})^{2}\)
\(\frac{I}{I_{2}}=\frac{M R^{2}}{n M(n R)^{2}}=\frac{1}{n^{3}}=\frac{1}{8} \)
\(\therefore n^{3}=8 \)
\(\therefore n=\sqrt[3]{8}=2 \)
5.
(a)
5/7 sin\(\theta\)
6.
(b)
2/7
7.
(a)
B
8.
(d)
The axis of rotation
9.
(b)
4mr2
10.
(a)
1/2\(\overrightarrow { a } \)
11.
(b)
\(\tau =I\alpha \)
12.
(b)
zero
13.
(b)
Towards M
14.
(d)
converts transnational energy into rotational energy
15.
Potential energy = Translational kinetic energy + Rotational kinetic energy
\(m g h=\frac{1}{2} m v^{2}+\frac{1}{2} I \omega^{2} \)
\(=\frac{1}{2} m v^{2}+\frac{1}{2} \times \frac{2}{5} M R^{2} \times \frac{v^{2}}{R^{2}}\left[\omega=\frac{v}{R}\right] \)
\(=\frac{1}{2} m v^{2}+\frac{1}{5} m v^{2} \)
\(=\frac{5 m v^{2}+2 m v^{2}}{10}=\frac{7 m v^{2}}{10} \)
\(m g h=\frac{7 m v^{2}}{10} \)
\(g h=\frac{7 v^{2}}{10} \)
\(\therefore v^{2}=\frac{10 g h}{7} \)
\(\therefore v=\frac{\sqrt{10 g h}}{7} \)
16.
Moment of inertia of a disc
\(\mathrm{I}_{1}=\frac{M R^{2}}{2}\)
\(\text { Mass of small disc }=\frac{M}{\pi R^{2}} \times \pi \times\left(\frac{R}{2}\right)^{2}\)
\(=\frac{M}{\pi R^{2}} \times \frac{\pi R^{2}}{4}=\frac{M}{4}\)
By the theorem of parallel axis, the moment of inertia of the small disc. About an axis passing through 0 is
\(I_{2} =\frac{1}{2} \times \frac{M}{4}\left(\frac{R}{2}\right)^{2}+\frac{M}{4}\left(\frac{R}{2}\right)^{2} \)
\(=\frac{M}{8} \times \frac{R^{2}}{4}+\frac{M}{4} \times \frac{R^{2}}{4} \)
\(=\frac{M R^{2}}{32}+\frac{M R^{2}}{16}=\frac{M R^{2}+2 M R^{2}}{32} \)
\(I_{2} =\frac{3 M R^{2}}{32} \)
Moment of inertia of the remaining part is I= I1 - I2
\(=\frac{M R^{2}}{2}-\frac{3 M R^{2}}{32} \)
\(=\frac{16 M R^{2}-3 M R^{2}}{32}=\frac{13 M R^{2}}{32}\)
\(I =\frac{13 M R^{2}}{32} \)
17.
(d)
remaining constant
18.
(d)
13.5 hr
19.
(b)
When no external torque acts upon the system
20.
(d)
force acting on particle
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
Tamilnadu Stateboard 11th Standard Subjects
Maths
Commerce
Economics
Biology
Business Maths and Statistics
Accountancy
Computer Science
Physics
Chemistry
Maths
Biology
Economics
Physics
Chemistry
History
Business Maths and Statistics
Computer Science
Accountancy
Computer Applications
History
Computer Technology
Commerce
Computer Applications
Computer Technology
Tamil
English
French
Tamilnadu Stateboard Standards
