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Draw a neat and labelled diagram of a vernier callipers. Name its main parts and state their functions.
Name the two scales of a vernier callipers and explain how it is used to measure length correct up to 0.01 cm.
Define metre in terms of the wavelength of light.
State the formula for calculating length if:
Number of vernier scale division coinciding with the main scale and number of division of main scale on the left-hand side of zero of vernier scale is known.
When does a vernier callipers has the negative error?
Which part of vernier callipers is used to measure the internal diameter of a hollow cylinder?
In the following figure, the pitch of the screw is 1 mm. Calculate:
(i) the least count of screw gauge and
(ii) the reading represented in the figure.
The main scale reading while measuring the thickness of a rubber ball using Vernier caliper is 7 cm and the Vernier scale coincidence is 6. Find the radius of the ball.
