Question

Which one is a fundamental unit? i) Coulomb ii) Seconds iii) Joule iv) Volt

A

Coulomb

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B

Seconds

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C

Joule

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D

Volt

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Solution

The correct option is B Seconds Fundamental unit:Fundamental unit is unrelated units that form the foundation of a unit system.The meter, kilogram, and second, for example, are fundamental SI units.Derived unit:A derived unit in the International System of Units (SI) is a unit of measurement that is derived from one or more of the seven base units. Derived units are either dimensionless or derived from base units.The watt, hertz, and coulomb, for example, are derived units named after people. W, Hz, and C are their respective symbols. Meters per second (m/s), cubic meters (m3), and joules per kelvin (J/K) are other examples of derived units.Hence, Option(B) is correct.

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