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JEE Main Physics Class 11 Physical world and Measurements Part 1 Questions
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Question : 76
Total: 100
A student measured the length of a rod and wrote it as 3.50 cm. Which instrument did he use to measure it?
[2014]
A meter scale.
A vernier calliper where the 10 divisions in vernier scale matches with 9 division in main scale and main scale has 10 divisions in 1 cm.
A screw gauge having 100 divisions in the circular scale and pitch as 1 mm.
A screw gauge having 50 divisions in the circular scale and pitch as 1 mm.
Validate
Solution:
Measured length of rod = 3.50 cm
For Vernier Scale with 1 Main Scale Division = 1 mm
9 Main Scale Division = 10 Vernier Scale Division,
Least count = 1 MSD –1 VSD = 0.1 mm
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