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JAMB Physics 2024 Paper

Question : 53

Total: 125

Solution:

Concept:

The least possible error of a measuring instrument is half of its smallest scale division.

Explanation:

A standard metre rule has its smallest markings at intervals of

1\,\text{mm}

Therefore, its least count is

1\,\text{mm}

The least possible error in any single reading is half of the smallest division:

\text{Least possible error} = \frac{1}{2} \times 1\,\text{mm} = 0.5\,\text{mm}

This is the same as

0.05\,\text{cm}

Since the options are in millimetres, the correct value is

0.5\,\text{mm}

Answer:

0.5\,\text{mm}

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