Question

Q.10. What is SI? How many quantities are used as base quantities in SI? Write all the base quantities with their units.

Answer 1

S.I = Système Internationale d' unites( in French ) ; standard unit
" internationally accepted unit for measuring the quantity "
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Fundamental or base quantity

quantities - S.I units - symbols

1) MASS - kilograms - kg

2) TIME - second - s

3) LENGTH - meter - m

4) CURRENT - ampere - A

5) THERMODYNAMIC TEMPERATURE - Kelvin - K

6) AMOUNT OF THE SUBSTANCE - mole - mol

7) LUMINOUS INTENSITY - candela - cd
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