PhysicsEasy156×since 2002Q8355One main scale division of a vernier callipers is 'a' cm and n^th division of the vernier scale coincide with (n −-− 1)^th division of the main scale. The least count of the callipers in mm is :A10an{{10a} \over n}n10aB10na(n−1){{10na} \over {(n - 1)}}(n−1)10naC(n−110n)a\left( {{{n - 1} \over {10n}}} \right)a(10nn−1)aD10a(n−1){{10a} \over {(n - 1)}}(n−1)10aCheck answerSkip