s How can you use vernier callipers for measuring the diameter of a metallic Bob
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Keep the jaws of Vernier Callipers closed. Observe the zero mark of. the main scale. ...
Look for the division on the vernier scale that coincides with a. division of main scale. ...
Gently loosen the screw to release the movable jaw. Slide it enough. ...
Carefully note the position of the zero mark of the vernier scale.
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