What is the SI unit of time period?

Question

Question

This question was previously asked in

RRB JE CBT I - (Held On: 30 May 2019 Shift 1)

Answer 1

The correct answer is Second (s)

Key Points

The SI unit of time period is Second (s).
The second is one of the seven base units in the International System of Units (SI).
It is defined by taking the fixed numerical value of the cesium frequency, Δν_Cs, the unperturbed ground-state hyperfine transition frequency of the cesium-133 atom, to be 9,192,631,770 when expressed in the unit Hz, which is equal to s⁻¹.
This definition makes the second independent of physical artifacts and ensures its accuracy and stability over time.
The second is widely used in various fields such as physics, engineering, and everyday life to measure time intervals.

Additional Information

The International System of Units (SI) was established in 1960 by the 11th General Conference on Weights and Measures (CGPM).
The SI is a globally accepted system for measuring physical quantities, providing a clear and standardized way of expressing measurements.
Other base units in the SI system include the meter (m) for length, kilogram (kg) for mass, ampere (A) for electric current, kelvin (K) for temperature, mole (mol) for the amount of substance, and candela (cd) for luminous intensity.
SI units are essential for scientific research, industry, and commerce, ensuring consistency and accuracy in measurements worldwide.