Wrapping it around a pencil and measuring the length of turns with the help of a meter scale. Is this approach more accurate than determining the diameter of the wire with the help of a screw gauge? - Physics

प्रश्न

We can find the diameter of a wire by wrapping it around a pencil and measuring the length of turns with the help of a meter scale. Is this approach more accurate than determining the diameter of the wire with the help of a screw gauge?

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उत्तर

No, we cannot measure the diameter of a wire by wrapping it around a pencil because it is not very accurate. We can use a screw gauge for this purpose as it can measure the diameter correct up to 1/100 of a millimeter or even less.

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Vernier Callipers

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Q 47 Q 46 Q 48

अध्याय 1: Measurement - Exercise 5 [पृष्ठ ४८]

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फ्रैंक Physics [English] Class 9 ICSE

अध्याय 1 Measurement
Exercise 5 | Q 47 | पृष्ठ ४८

संबंधित प्रश्न

Explain the terms : Pitch .
How are they determined?

The pitch of a screw gauge is 1 mm and the circular scale has 100 divisions. In measurement of the diameter of a wire, the main scale reads 2 mm and 45th mark on the circular scale coincides with the base line. Find

(i) The least count and

(ii) The diameter of the wire.

Who invented vernier callipers?

When does a vernier callipers has the negative error?

What do you understand by the following term as applied to screw gauge?

Zero error

A measuring cylinder is filled with water up to a level of 30 ml. A solid body is immersed in it so that the level of water rises to 37 ml. Now the solid body is tied with a cork and then immersed in water so that the water level rises to 40 ml. Find the volume of the solid body and the cork.

What is the purpose of a ratchet in a screw gauge?

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

Thermometer

Why is the screw gauge so named?

If the 4^th division of the circular scale coincides with the zero of the main scale of a screw gauge of least count 0.01 mm, what is it's zero error?