Question

Pls answer these questions: 1. A stop clock has 10 divisions graduated between 0 and 5 s marks. What is its least count? 2. A Vernier has 10 divisions and they are equal to 9 divisions of main scale in length. If the main scale is calibrated in mm, what is its least count? 3. A boy uses a Vernier callipers to measure the thickness of his pencil. He measures it to be 1.4 mm. If the zero error of Vernier callipers is + 0.02 cm, what is the correct thickness of pencil? 4. A Vernier callipers has its main scale graduated in mm and 10 divisions on its Vernier scale are equal in length to 9 mm. When the two jaws are in contact, the zero of Vernier scale is ahead of zero of main scale and 3rd division of Vernier scale coincides with a main scale division. Find: (i) the least count and (ii) the zero error of the Vernier callipers.

Answer 1

Answer:

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