8th Standard Syllabus & Materials
8th Standard
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NEW8th Standard
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NEW8th Standard
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NEW8th Standard
Tamilnadu 8th Standard Social Science рокрпКро░рпБро│ро┐ропро▓рпН - рокрпКродрпБ рооро▒рпНро▒рпБроорпН родройро┐ропро╛ро░рпН родрпБро▒рпИроХро│рпН Important Questions And Answers Study Material - QB365
NEW8th Standard
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NEW8th Standard
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Published on: 03/12/2019
Measurement
Download Tamil Nadu 8th Standard Science 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 Science Test1.
The unit of charge is ______
Coulomb
Ampere
Radian
Steradian
2.
__________ is the measure of the perceived power of light.
Luminous flux
Luminous power
Luminous Intensity
Both a and b
3.
Quantities other than base quantities are called as
supplementary quantities
derived quantities
professional quantities
energy quantities
4.
SI unit stands for
International system of units
Integrated System of units
International symbol of units
Integrated symbol of units
5.
Luminous intensity is the intensity of ________
Laser light
UV light
visible light
IR light
6.
Give the general formula for the conversion of scales of temperature?
7.
Which thermometer measures the temperature of an object without any physical contact?
8.
How many times will the ‘minute hand’ rotate in one hour?
9.
What is the SI unit of Luminous Intensity?
10.
What is the ‘Lower Fixed Point’ of the Fahrenheit scale?
11.
Convert i) 74°C into kelvin, ii) 329 K into celsius
12.
What is meant by piezoelectric property?
13.
What are the differences between Plane angle and solid angle?
14.
Define - mole.
15.
What do you mean by luminous Intensity?
16.
List the various scales to measure temperature and Give the application of various thermometric scales.
17.
List out the base quantities with their units.
1.
(a)
Coulomb
2.
(d)
Both a and b
3.
(b)
derived quantities
4.
(a)
International system of units
5.
(c)
visible light
6.
\(\frac { C-10 }{ 100 } =\frac { F-32 }{ 180 } =\frac { K-273 }{ 100 } \)
7.
Infrared thermometer.
8.
The 'minute hand' rotates once in One hour.
9.
The SI unit of Luminous Intensity is Candela.
10.
32°F
11.
i) 74°C into kelvin
K = C+273
= 74 + 273
K = 347 kelvin
ii) 320 K into celsius
C = K-273
= 320- 273
C = 47 celsius
12.
When pressure is applied along a particular axis of a crystal, an electric potential difference is developed in a perpendicular axis
13.
| Plane angle | Solid angle |
| Angle between the intersection of two straight lines or two planes. | Angle formed by three or more planes intersecting at a common point. |
| S. I unit - radian(rad) | S. I unit - steradian (sr) |
| It is Two dimensional | It is Three dimensional |
14.
Mole is defined as The amount of substance which contains 6.023 x 1023 entities.
15.
i) The measure of the power of the emitted light in a particular direction per unit solid angle.
ii) S.I unit - candela (cd)
16.
| Types of scale | Lower fixed point (LEP) | Upper fixed point (UFP | No. of divisions in thermometer |
| Celsius Fahrenheit Kelvin |
0OC 32°C 273K |
100°C 212°C 373 K |
100 180 100 |
Application of Various thermometric scales:
i. Physicians use clinical thermometers graduated in Fahrenheit scale.
ii. Scientists are using thermometers with kelvin scale.
iii. Common temperature measurement are made in celsius scale.
iv. Weather reports are given in celsius scale.
17.
| Quanitity | Unit | Symbol |
| Length | Metre | m |
| Mass | Kilogram | kg |
| Time | Second | s |
| Temperature | Kelvin | K |
| Electric current | Ampere | A |
| Amount of substance | Mole | mol |
| Luminous intensity | Candela | cd |
8th Standard Syllabus & Materials
8th Standard
Tamilnadu 8th Standard Social Science рокрпБро╡ро┐ропро┐ропро▓рпН - рокрпБро╡ро┐рокрпНрокроЯроЩрпНроХро│рпИроХрпН роХро▒рпНро▒ро▒ро┐родро▓рпН Important Questions And Answers Study Material - QB365
NEW8th Standard
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NEW8th Standard
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NEW8th Standard
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Tamilnadu Stateboard 8th Standard Subjects
Tamilnadu Stateboard Standards
