Which of the following is not a fundamental quantity?
Correct answer: D. Ampere
- A. Length
- B. Temperature
- C. Electric charge
- D. Ampere
Explanation
Ampere is not a fundamental quantity. It is a derived quantity. Ampere is the unit of electric current, and electric current is defined in terms of the flow of electric charge per unit time. In the SI system, the ampere is defined in terms of the elementary charge and is not considered a fundamental quantity.
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About Measurements
Physical quantities are expressed with SI base and derived units, while measurement limits are described through accuracy, precision, absolute and percentage error, and significant figures. Dimensional analysis checks equations, derives relationships and detects inconsistent units, but it cannot determine numerical constants or distinguish quantities with identical dimensions.
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