Which one of the following is a fundamental quantity?
Correct answer: B. Candela
- A. Area
- B. Candela
- C. Acceleration
- D. Velocity
Explanation
The candela is a fundamental quantity. It is the SI unit of luminous intensity, which measures the brightness of light. Luminous intensity is considered a fundamental quantity in the SI system.
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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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