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प्रश्न
Explain the term least count of a screw gauge. How are they determined?
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उत्तर
Least count refers to the smallest reading that can be accurately measured while using an instrument. The least count is the value of one division on its scale.
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संबंधित प्रश्न
When is a vernier Callipers said to be free from zero error?
Fig., below shows the reading obtained while measuring the diameter of a wire with a screw gauge. The screw advances by 1 division on the main scale when circular head is rotated once.
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(iii) The diameter of the wire.
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Positive zero error
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The least count of a screw gauge can be lowered by increasing the number of divisions on its thimble.
