A-Level H2 Physics Practice Questions - Singapore-Cambridge GCE A-Level Higher 2 (H2) Physics (Syllabus 9749) Exam

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A micrometer screw gauge has a smallest scale division of 0.01 mm. A student records a wire diameter as 0.54 mm. What is the percentage uncertainty in this single reading, taking the uncertainty as one smallest division?

0.5% 1.9% 5.4% 0.18%

Correct Answer:

1.9%

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