SarkariPYQ

SSC CHSL 2020 PYQ — Question 28

SSC CHSL - 14th October 2020 - Shift 2 • General Awareness • Q28

Back to paper

Which of the following units is used for the measurement of Luminous Intensity?

Show answer & explanation

Correct answer: B

Explanation

The correct answer is option 2 i.e. Candela.

Candela (cd), which is the SI unit for measuring luminous intensity—the brightness of a light source as perceived by the human eye.

Other options:

  1. Mole (mol) – Measures the amount of substance in chemistry, representing Avogadro's number of particles (atoms, molecules, etc.).

  2. Ampere (A) – Measures electric current, representing the flow of electric charge.

  3. Kelvin (K) – Measures thermodynamic temperature, used in scientific and engineering contexts.

Candela is unique to light perception, while the others quantify different physical properties. The choice depends on whether the measurement relates to light (Candela), substance (Mole), electricity (Ampere), or temperature (Kelvin).