What are the units for base quantities called?

Correct option is B

The correct answer is (B) Fundamental or base units

Explanation:

• The units for base quantities in the International System of Units (SI) are referred to as fundamental or base units. These base units represent the fundamental physical quantities and are the building blocks for all other measurements.

• The seven base quantities and their respective units in the SI system are:

  1. Length – meter (m)

  2. Mass – kilogram (kg)

  3. Time – second (s)

  4. Electric current – ampere (A)

  5. Thermodynamic temperature – kelvin (K)

  6. Amount of substance – mole (mol)

  7. Luminous intensity – candela (cd)

Information Booster:

• Base units are defined independently and are not derived from other units.

• All other units, known as derived units, are combinations of these base units, such as velocity (m/s), force (kg·m/s²), etc.

Additional Information:

• Option A (Standard basic units): This is not the commonly used term. The correct term is fundamental or base units.

• Option C (Basic constants): Constants such as the speed of light or Planck's constant are not related to the basic units of measurement.

• Option D (Derived basic units): Derived units are combinations of base units but are not considered base quantities themselves.