1
BITSAT 2021
MCQ (Single Correct Answer)
+3
-1

If nth division of main scale coincides with (n + 1)th division of vernier scale. The least count of the vernier is (Given, one main scale division is equal to a units)

A
$${{a + 1} \over {n + 1}}$$
B
$${a \over n}$$
C
$${a \over {n + 1}}$$
D
$${{a + 1} \over n}$$
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