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Zero Error

Assertion :A ...

Question

Assertion :A vernier callipers has a positive error of 0.5 mm, then the correction is -0.5 mm. Reason: In case of positive zero error, measured length is greater than the actual length.

A

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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B

Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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C

Assertion is correct but Reason is incorrect

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D

Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
When the zero error of a calipers is positive, it will be subtracted from the measured value because the positive zero error gives the extra measured value. So, the measured is greater than of actual value.

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