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प्रश्न
What is measurement? How is a measurement expressed?
What is measurement?
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उत्तर १
Measurement is a comparison of an unknown quantity with a known fixed quantity of the same kind.
The value obtained on measuring a quantity is called its magnitude. The magnitude of a quantity is expressed as numbers in its unit.
उत्तर २
Measurement is the process of finding an unknown physical quantity by using a standard quantity.
संबंधित प्रश्न
Match the following:
| Column A | Column B |
| 1.Volume of a liquid | 1. kg `m^-3` |
| 2. Area of a leaf | 2. `m^3` |
| 3. S.I. unit of volume | 3. graph paper |
| 4. S.I. unit of density | 4. m `s^-1` |
| 5. S.I.unit of speed | 5. measuring cylinder |
Select the correct alternative
One litre is equal to :
Arrange the following substances in order of their increasing density:
(a) iron
(b) cork
(c) brass
(d) water
(e) mercury
How does the density of water changes when it is heated from 0°C to 4°C,
The density of copper is 8.9 g cm-3. What will be its density in kg m-3 ?
Express 36 km h-1 in m s-1
Select the correct alternative:
A metre ruler is graduated in:
Convert the following quantity as indicated :
12 inch = ft
Convert the following quantity as indicated:
5 mg = ………. kg
Express in second :
3 minute 15 second
State if the following statement is true or false:
The symbol used for a unit is always written in capital letters.
Tick the most appropriate answer.
Which of the following weighing devices has very high accuracy and sensitivity?
Give a reason for the following.
Measurements are very important for life.
Give a reason for the following.
Measuring units are standardized.
Solve the following numerical problem.
Express 6L in mL.
Solve the following numerical problem.
Express 8000 g in kg?
Explain giving examples.
Vector quantity
What are the multiples and sub multiples of mass?
Match the following:
| Column I | Column II | |
| 1. | FPS | Metre, kilogram, and second |
| 2. | CGS | Foot, pound, and second |
| 3. | MKS or SI | centimeter, gram, and second |
Match List I with List II.
| List I | List II | ||
| A. | Torque | I. | Nms-1 |
| B. | Stress | II. | J kg-1 |
|
C. |
Latent Heat | III. | Nm |
|
D. |
Power | IV | Nm-2 |
Choose the correct answer from the options given below:
