65th B.P.S.C. (Pre) 2019
What is measured in hertz?
aFrequency✓ Correct
bEnergy
cHeat
dQuality
eNone of the above/More than one of the above
Explanation
The SI unit of frequency is hertz; that is, frequency is measured in hertz. It is denoted by the symbol Hz. A normal human being can hear sound frequencies roughly from 20 Hz to 20,000 Hz.
general-science