Question

Which among the given options has the greatest value?

• A. 1 THz
• B. 1 EHz
• C. 1 ZHz
• D. 1 PHz

Answer 1

The correct option is C 1 ZHz

Hertz(Hz) is the S.I unit of frequency.

Using prefix conversions,
(Tera), $1THz={10}^{12}Hz$
(Exa), $1EHz={10}^{18}Hz$
(Zetta), $1ZHz={10}^{21}Hz$
(Peta), $1PHz={10}^{15}Hz$

Hence, 1 ZHz is the largest.