Physics
The circular head of a screw gauge is divided into 50 divisions and the screw moves 1 mm ahead in two revolutions of the circular head. Its pitch would be:
- 0.05 cm
- 0.001 cm
- 0.5 cm
- 0.01 cm
Measurements
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Answer
0.05 cm
Reason — Pitch = distance moved ahead in 1 revolution
Given, distance moved in 2 revolutions = 1 mm
∴ Distance moved in 1 revolution = mm = 0.5 mm
Converting 0.5 mm to cm,
0.5 mm = cm = 0.05 cm
∴ Pitch of screw gauge is 0.05 cm
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Related Questions
A microscope has its main scale with 20 divisions in 1 cm and vernier scale with 25 divisions, the length of which is equal to the length of 24 divisions of main scale. The least count of microscope is :
- 0.002 cm
- 0.001 cm
- 0.02 cm
- 0.01 cm
Identify the correct use of the thimble of a screw gauge:
- To read length correct up to 0.01 mm
- To read length correct up to 1 mm
- To mark main scale and base line
- To mark circular scale.
Identify the incorrect statement from the following :
(a) A screw gauge is used to measure very small dimensions like the thickness of a wire or sheet.
(b) Vernier callipers is used to measure larger dimensions like the diameter of a sphere, internal or external diameter lengths, etc.
(c) Vernier callipers works on the principle of a sliding scale to measure fractional parts of a main scale.
(d) Vernier callipers has a higher precision with a larger least count whereas screw gauge has a lower precision with a smaller least count.
Define the least count of an instrument.