A vernier calliper is having $$1$$ main scale division $$=$$ $$1$$ mm. Ten divisions of vernier scale coincide. with nine divisions of main scale. If two jaws of instrument touch each other, the $$8$$ th division of vernier scale coincide with a mark of main scale and the zero of the vernier scale lies to the right of the zero of main scale. While measuring the length of cylinder, the zero of the vernier seale lies slightly to the left of $$3.2$$ cm and the fourth vernier division coincides with a mark of the length cylinder is

Question

A vernier calliper is having $$1$$ main scale division $$=$$ $$1$$ mm. Ten divisions of vernier scale coincide. with nine divisions of main scale. If two jaws of instrument touch each other, the $$8$$ th division of vernier scale coincide with a mark of main scale and the zero of the vernier scale lies to the right of the zero of main scale. While measuring the length of cylinder, the zero of the vernier seale lies slightly to the left of $$3.2$$ cm and the fourth vernier division coincides with a mark of the length cylinder is

Infinity Learn · Accepted Answer

Least count $$=$$ $$1$$ $$mm-0.9$$ $$mm=0.1$$ mmReading $$=$$ Main scale reading $$+$$ Vemier scale reading $$-$$ |zero error|$$=3.1$$ $$cm+4$$×$$0.1$$ $$mm-0.8$$ $$mm=(3.1+0.04-0.08)cm=$$ $$3.06$$ cm

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