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NTA Abhyas 2020

Exam: NTA Abhyas
Year: 2020
Subject: Physics
Chapter: Units and Dimensions

NTA Abhyas 2020 · Physics · Units and Dimensions

The density of a cube is measured by measuring its mass and length...

The density of a cube is measured by measuring its mass and length of its sides. If the maximum errors in the measurement of its mass and length are

4%

and

3%

, respectively, then, the maximum error in density is

Options

A $1%$
B $7%$
C $5%$
D $13%$

Correct answer

D. $13%$

Step-by-step solution

ρ = \dfrac{Mass}{L3}

%errorinρ = %errorinmass + 3 [ %errorinlength ]

= 4 % + 3 [ 3% ] = 13%

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