How many mutually independent base quantities are there in the current International System of Units (SI)?

Correct option is B

The correct answer is (b) 7
Explanation:
• SI base quantities:
– Length (m)
– Mass (kg)
– Time (s)
– Electric current (A)
– Thermodynamic temperature (K)
– Amount of substance (mol)
– Luminous intensity (cd)
• All other physical quantities are derived.
• Standardised by CGPM; described in NCERT Class XI Physics.
Information Booster:
• 2019 revision linked SI to fundamental physical constants.
Additional Knowledge:
10 (Option a)
. Not defined in SI base system.
6 (Option c)
. Missing luminous intensity.
13 (Option d)
. Incorrect classification.