11th Standard Syllabus & Materials
11th Standard
Tamilnadu 11th Standard Tamil மொழி கலை -செய்யுள் - ஒவ்வொரு புல்லையும் Important Questions And Answers Study Material - QB365
NEW11th Standard
Tamilnadu 11th Standard Tamil கேடில் விழுச்செல்வம் - உரைநடை - தமிழகக் கல்வி வரலாறு Important Questions And Answers Study Material - QB365
NEW11th Standard
Tamilnadu 11th Standard Tamil பீடு பெற நில் - இலக்கணம் - பகுபத உறுப்புகள் Important Questions And Answers Study Material - QB365
NEW11th Standard
Tamilnadu 11th Standard Tamil பீடு பெற நில் - செய்யுள் - குறுந்தொகை Important Questions And Answers Study Material - QB365 Set B
NEW11th Standard
Tamilnadu 11th Standard Tamil பீடு பெற நில் - செய்யுள் - குறுந்தொகை Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
Tamilnadu 11th Standard Tamil பீடு பெற நில் - செய்யுள் - காவடிச்சிந்து Important Questions And Answers Study Material - QB365 Set B
Published on: 13/05/2022
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Questions + Answers key
Take MCQ Physics Test1.
Having all units in atomic standards is more useful. Explain.
2.
Show that a screw gauge of pitch 1mm and 100 divisions is more precise than a vernier caliper with 20 divisions on the sliding scale.
3.
The measurement value of length of a simple pendulum is 20cm known with 2mm accuracy. The time for 50 oscillations was measured to be 40 s within is resolution. Calculate the percentage accuracy in the determination of acceleration due to gravity 'g' from the above measurement.
4.
The radius of the circle is 3.12 m. Calculate the area of the circle with regard to significant figures.
5.
From a point on the ground, the top of a tree is seen to have an angle of elevation 60o . The distance between the tree and a point is 50m. calculate the height of the tree?
1.
All units in atomic standards are more useful because they never change with time.
2.
Least count of screw gauge
\(={{Pitch}\over{No. of\ divisions}}\)
\(={{1}\over{100}}=0.01\ mm\) (or) 0.001 cm
Least count of vernier calipers
\(=1MSD-1-1VSD=(1-19/20)MSD\)
\(={{1}\over{20}}\) = 0.05 cm.
So screw gauge is more precise than vernier.
3.
Length of a simple pendulum \(l=20 \mathrm{~cm}=20 \times 10^{-2} \mathrm{~m}\)
\(\text {Accuracy }=2 \mathrm{~mm}=2 \times 10^{-3} \mathrm{~m}\)
Time for one oscillation \(=\frac{40}{50}=0.88\)
\(T =2 \pi \sqrt{\frac{l}{g}} ; T^{2}=4 \pi^{2}\left(\frac{l}{g}\right) \)
\(g =\frac{4 \pi^{2} l}{T^{2}}\)
\(\frac{\Delta g}{g} \times 100 ==\frac{\Delta l}{l} \times 100+2 \frac{\Delta T}{T} \times 100
\)
\(l =20 \mathrm{~cm} \Delta l=2 \mathrm{~mm}=0.2 \mathrm{~cm} \Delta T=1 \mathrm{~s}
\)
\(\frac{\Delta g}{g} =\frac{\Delta l}{l}+2 \frac{\Delta T}{T}
\)
\(=\frac{0.2}{20}+2 \times \frac{1}{40} \)
= 0.01 + 0.05 = 0.06
\(\therefore\) Percentage accuracy in the determination of g=0.06 x 100=6 %
4.
Radius of the circle r = 3.12 m
Area of the circle A = \(\pi\) r2
= 3.14\(\times\)3.12\(\times\)3.12
= 30.566016 m2
According to the rule of significant
A = 30.6 m2
5.
Angle \(\theta\) = 60 o
The distance between the tree and a point
x = 50m
Height of the tree (h)=?
For triangulation method tan\(\theta\) =\({h\over x}\)
h= x tan \(\theta\) = 50\(\times\)tan 600 = 50\(\times\)1.732
h = 86.6m
The height of the tree is 86.6m.
11th Standard Syllabus & Materials
11th Standard
Tamilnadu 11th Standard Tamil பீடு பெற நில் - செய்யுள் - காவடிச்சிந்து Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
Tamilnadu 11th Standard Tamil பீடு பெற நில் - உரைநடை - மலை இடப்பெயர்கள் : ஓர் ஆய்வு Important Questions And Answers Study Material - QB365 Set B
NEW11th Standard
Tamilnadu 11th Standard Tamil பீடு பெற நில் - உரைநடை - மலை இடப்பெயர்கள் : ஓர் ஆய்வு Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
Tamilnadu 11th Standard Tamil மாமழை போற்றுதும் - செய்யுள் - ஐங்குறுநூறு Important Questions And Answers Study Material - QB365 Set B
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
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