(i) Both A and R are true and R is the correct explanation of A ii) Both A and R - Physics - Units And Measurements

Question

(i) Both A and R are true and R is the correct explanation of A
ii) Both A and R are true but R is not the correct explanation of
A
(iii) A is true but R is false
(iv) A is false and R is true
Assertion : The number of significant figures depends on the least
count of
measuring instrument
Reason : Significant figures define the accuracy of measuring
instrument

Anshu Agrawal · Accepted Answer

Dear student,
Assertion is correct but Reason is incorrect
The significant digits determine precision of the instrument, let's
say using scale a value read is 1 8 m, using more precise
instrument the reading can be 1 83
Accuracy is closeness of a measured value to actual value, which is
independent of measuring instrument least count

Regards