The main scale in a vernier instrument is graduated in millimeters, with the smallest division being 1mm. Ten divisions on the vernier scale correspond to 11 divisions on the main scale Answer the following questions. (a) Is the vernier scale a forward vernier or backward vernier? (b) What is the least count of the instrument? (c) If the main scale reads 12mm and the 10th division on the vernier scale coincides with a division on the main scale, what is the value of the dimension being measured?

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Estimate of calculation