JEE PHYSICS MCQ: UNITS & MEASUREMENTS

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Application +4 | -1

The relative error in calculating the value of

g

from the relation

T=2 \pi \sqrt{\frac{l}{g}}

is (given the relative errors in calculating

\mathrm{T}

and

l

are

\pm x

and

\pm y

respectively)

View answer and explanation

Correct option: C

2 x+y

Option A (

x+y

) is incorrect. The correct answer is

2x+y

because the relative error in g is the sum of the relative error in l and twice the relative error in T.

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