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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 .

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In an experiment the angle are required to be measured using an instrument 29 divisions of the main scale exactly coinecide 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

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