Least count of a vernier calliper or travelling microscope from its scale divisions

1. A.
   $\frac{10\text{~na~}}{(n - 1)}$
2. B.
   $\frac{10a}{(n - 1)}$
3. C.
   $\left( \frac{n - 1}{10n} \right)$ a
4. D.
   $\frac{10a}{n}$

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1. A.
   $0.001\text{ }cm$
2. B.
   $0.002\text{ }mm$
3. C.
   $0.002\text{ }cm$
4. D.
   $0.005\text{ }cm$

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1. A.
   $0.1\text{ }mm$
2. B.
   $0.1\text{ }cm$
3. C.
   $0.01\text{ }cm$
4. D.
   $0.01\text{ }mm$

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1. A.
   $\frac{1}{2}$
2. B.
   $\frac{10}{11}$
3. C.
   $\frac{50}{11}$
4. D.
   $\frac{5}{11}$

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1. A.
   1
2. B.
   0.5
3. C.
   2
4. D.
   5

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1. A.
   $\left( \frac{2\text{ }N - 1}{20\text{ }N} \right)$
2. B.
   $\left( \frac{2\text{ }N - 1}{2} \right)$
3. C.
   $(2\text{ }N - 1)$
4. D.
   $\left( \frac{2\text{ }N - 1}{2\text{ }N} \right)$

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1. A.
   $\frac{n}{(n + 1)}$
2. B.
   $\frac{m}{(n + 1)}$
3. C.
   $\frac{1}{(n + 1)}$
4. D.
   $\frac{m}{n(n + 1)}$

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1. A.
   0.001
2. B.
   0.002
3. C.
   0.0005
4. D.
   0.0025

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1. A.
   0.002
2. B.
   0.05
3. C.
   0.02
4. D.
   0.005

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