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TN 11th Tamil இயற்கை வேளாண்மை,சுற்றுச்சூழல் -செய்யுள் - மனோன்மணீயம் Important Questions And Answers Study Material - QB365 Set A
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TN 11th Tamil என்னுயிர் என்பேன் -துணைப்பாடம் - இசைத்தமிழர் இருவர் Important Questions And Answers Study Material - QB365 Set A
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TN 11th Tamil மொழி கலை -செய்யுள் - ஒவ்வொரு புல்லையும் 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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TN 11th Tamil பீடு பெற நில் - செய்யுள் - குறுந்தொகை Important Questions And Answers Study Material - QB365 Set A
Published on: 27/08/2019
Work, Energy and Power
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.
Two equal masses m1 and m2 moving along the same straight line with velocities +3 m/s and -5 m/s respectively collide elastically. Their velocities after the collision will be respectively _______________.
- 4 m/s and +4 m/s
+4 m/s for both
- 3 m/s and +5 m/s
- 5 m/s and + 3 m/s
2.
An engine pumps water continuously through a hose. Water leaves the hose with a velocity v and m is the mass per unit length of the water of the jet. What is the rate at which kinetic energy is imparted to water?
\({{1}\over{2}}{m}{v}^{2}\)
mv3
\({{1}\over{2}}{m}{v}^{3}\)
\({{1}\over{2}}{m}{v}^{2}\)
3.
Convert 1 kwh in joule ______________.
1.2\(\times\)102 J
2.4\(\times\)104 J
3.6 \(\times\)106 J
4.4 \(\times\)103 J
4.
A cricket ball falls from a height of 40 m. What is the velocity with which the ball hits the ground?
40 m/s
20 m/s
16 m/s
28 m/s
5.
6.
The work done by the conservative force for a closed path is
always negative
zero
always positive
not defined
7.
The potential energy of a system increases, if work is done
by the system against a conservative force
by the system against a non-conservative force
upon the system by a conservative force
upon the system by a non- conservative force
8.
The coefficient of restitution e for a perfectly elastic collision is ______________.
1
0
\(\alpha\)
-1
9.
A particle of mass m is being rotated on a vertical circle of radius r. If the speed of particle at the highest point be v, then ______________.
mg=\(\frac{mv^{2}}{r}\)
mg>\(\frac{mv^{2}}{r}\)
mg<\(\frac{mv^{2}}{r}\)
mg≥\(\frac{mv^{2}}{r}\)
10.
A ball of mass 1 kg and another of mass 2 kg are dropped from a tall building whose height is 80 m. After, a fall of 40 m each towards Earth, their respective kinetic energies will be in the ratio of
\(\sqrt2:1\)
\(1:\sqrt2\)
2:1
1:2
1.
(d)
- 5 m/s and + 3 m/s
2.
Mass per unit length = m
Velocity = v
(mass of water pumped in one second)
M = mv
\(\text { Kinetic energy }=\frac{1}{2} M v^{2}\)
\(=\frac{1}{2} m v^{3}\)
3.
(c)
3.6 \(\times\)106 J
4.
(d)
28 m/s
5.
(c)
6.
(b)
zero
7.
(a)
by the system against a conservative force
8.
For a perfectly elastic collision
\(\left|v_{1}-v_{2}\right|=\left|u_{1}-u_{2}\right| \)
\(v_{e}=\frac{\left|v_{1}-v_{2}\right|}{\left|u_{1}-u_{2}\right|}=1
\)
9.
(c)
mg<\(\frac{mv^{2}}{r}\)
10.
\(m_{1} =1, \quad m_{2}=2 \)
\(K . E . =m g(h-x) \)
\(\text { For both balls }(h-x)\)
\(=40 \text { i.e.) Same }\)
\(g=\text { constant }\)
\(\therefore K \cdot E_{1}=m_{1} g(h-x)=m_{1} g \times 40 \)
\(K \cdot E_{2}=m_{2} g(h-x)=m_{2} g \times 40 \)
\(\therefore \frac{K \cdot E_{1}}{K \cdot E_{2}}=\frac{m_{1} g \times 40}{m_{2} g \times 40}=\frac{m_{1}}{m_{2}} \)
\( \therefore K \cdot E_{1}: K \cdot E_{2}=1: 2 \)
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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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
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Tamilnadu Stateboard Standards
