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In a experiment the angle are require...

In a experiment the angle are required to be measured using an instrument. 26 divisions of the main scale exactly coincide with the 30 divisions of the vernier scale . If the smallest 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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TARGET PUBLICATION-MEASUREMENTS-COMPETITIVE THINKING ( DIMENSIONAL ANALYSIS)
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