Answer: 0.4%.
- A 4%
- B 0.04%
- C 1%
- D 0.4%
Correct answer: D. 0.4%
Explanation: Percentage error = (least count/measured value) × 100 = (0.1/25.5) × 100 ≈ 0.4%.
The 7 SI base units. All derived units (newton, joule, watt, volt, etc.) can be expressed as combinations of these 7 fundamental units raised to various powers.
Concept context
SI base units, dimensional analysis, significant figures, and error propagation. The toolkit every physics calculation relies on.