A screw gauge has 50 divisions on its circular scale and the pitch of the screw is 0.5 mm. What us its least count? - Physics

A screw gauge has 50 divisions on its circular scale and the pitch of the screw is 0.5 mm. What us its least count?

Short Note

Pitch of the screw= 0.5 mm

No. of divisions on circular scale = 50

`"Least count"="pitch of the screw"/"no. of divisions on the circular scale"`

so, L.C. = `0.5/50=0.01` mm

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Vernier Callipers

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Chapter 1: Measurement - Exercise 5 [Page 47]

Chapter 1 Measurement
Exercise 5 | Q 42 | Page 47

The wavelength of light of a particular colour is 5800 Å.
Express it in nanometre.

Name the two scales of a vernier callipers and explain how it is used to measure length correct up to 0.01 cm.

The diameter of a thin wire can be measured by

The Wavelength of a particular colour is 5400Å. Express it in nanometer and metre.

State whether the following statement is true or false by writing T/F against it.

The diameter of a wire can be measured more accurately by using vernier calipers than by a screw gauge.

What is the least count in the case of the following instrument?

Stopwatch

What is the least count in the case of the following instrument?

Thermometer