NEET 2026 Physics question
One main scale division of a Vernier calliper is equal to 1 mm and the number of divisions on the Vernier scale is 10. When both the jaws touch each other, the Vernier scale shifts to the left of zero of the main scale in such a way that 4 Vernier division coincides with a division of the main scale. If this Vernier calliper measures the length of the wire to be 1 cm, the actual length of the wire is :
Answer: (4)
Solution
With 10 Vernier scale divisions equal to 9 main scale divisions (), the least count is . Since the Vernier zero shifts to the left of the main scale zero when the jaws touch, the instrument has a negative zero
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