Correct option is C
The value of each main-scale division of a
Vernier bevel protractor is
1°. The main scale on a Vernier bevel protractor is typically graduated in degrees, and each division represents 1°. The Vernier scale, on the other hand, is designed to subdivide the main scale divisions for greater precision, typically down to 5 minutes (5'). This allows for fine adjustments and highly precise angle measurements.
Main Scale: The main scale is graduated in whole degrees, with each division equal to
1°.
Vernier Scale: The Vernier scale is used to measure fractions of a degree, often down to 5 minutes (1/12 of a degree).
Least Count: The least count of a Vernier bevel protractor is typically
5’ (minutes), meaning it can measure angles to a precision of 1/12th of a degree.
Important Points
1 degree minutes.
A micrometer may have a least count of 0.01 mm while a Vernier scale on caliper may have a least count of 0.02 mm .
