Question
Download Solution PDFHow many fundamental SI units are there?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe Correct Answer is 7.
Key Points
- The SI consists of 7 base units that describe the 22 units with special names and symbols that are derived. In international trade, the SI plays an important role and is widely used in scientific and technical research and development.
- The modern form of the metric system is the International System of Units (SI). In almost every nation in the world, it is the only method of measurement with official status.
- It consists of a coherent system of measurement units beginning with seven base units, the second (unit of time with the symbol s), the meter (length m), the kilogram (mass, kg), the ampere (electric current, A), the kelvin (thermodynamic temperature, K), the mole (substance quantity, mol) and the candela(luminous intensity, cd).
Important Points
| Symbol | Name | Quantity |
| s | seconds | time |
| m | meter | length |
| kg | kilogram | mass |
| A | ampere | electric current |
| K | kelvin | thermodynamic temperature |
| mol | mole | amount of substance |
| cd | candela | luminous intensity |
Last updated on Jun 7, 2025
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