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Topic Content:
- Definition of Length
- Definition of Metre Rule
- Definition of Vernier Calliper
- How to Read a Vernier Calliper
- Definition of Micrometer Screw Gauge
- How to Read a Micrometer Screw Gauge
- Key Points
What is Length?
Length is the extent of space between two points. Its SI unit is the metre (m) . Length can be measured using instruments such as a tape rule, metre rule, vernier calliper and micrometer screw gauge.
The instrument used depends on the size of the object and the precision required. A vernier calliper or micrometer screw gauge can be used to measure small dimensions more precisely than a metre rule.
What is a Metre Rule?
A metre rule is an instrument used to measure the length of objects. It is usually calibrated in centimetres and millimetres.
A metre rule is 1 metre (m) long, which is equal to 100 centimetres (cm) . Each centimetre is divided into 10 millimetres (mm) .
The smallest division on a standard metre rule is usually 1 mm , or 0.1 cm . Therefore, its resolution is 1 mm .
Vernier Calliper:
A vernier calliper is a precision instrument
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