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in an experiment the angles are required...

in an experiment the angles are required to be using an instrument, `29` divisions of the main scale exactly coincide with the `30` divisions of the vernier scale. If the sallest division of the main scale is half- a degree `(= 0.5^(@)`, then the least count of the instrument is :

A

one minute

B

half minute

C

one degree

D

half degree

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The correct Answer is:
A
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