The least count of a measuring scale is $ 1 \mathrm{~mm} $. The heights two students is measured with it. What will be the error in the difference between their heights?

Question

The least count of a measuring scale is $ 1 \mathrm{~mm} $. The heights two students is measured with it. What will be the error in the difference between their heights?, $ 1 \mathrm{~mm} $, $ 0 \mathrm{~mm} $, $ 2 \mathrm{~mm} $, $ 0.5 \mathrm{~mm} $

MARKS App · Accepted Answer

Given, The least count, ∆ l = 1 mm The error in the reading of the first student, ∆ l 1 = ∆ l = 1 mm The error in the reading of the second student, ∆ l 2 = ∆ l = 1 mm During addition or subtraction of two measurements, the error gets added up. Hence, the net error becomes, ∆ l n e t = ∆ l 1 + ∆ l 2 = 2 mm

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