QJEEM21Ph85f4: JEE Main 2021 Physics - Class 11 JEEM21Ph85f4 Solution: The resistance R = , where V = (50 2)V and I = (20 0.2)A. The…

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The resistance R =

{V \over I}

, where V = (50

\pm

2)V and I = (20

\pm

0.2)A. The percentage error in R is 'x'%. The value of 'x' to the nearest integer is _________.

Accepted Answer

R = {V \over I}

{{\Delta R} \over R} \times 100 = {{\Delta V} \over V} \times 100 + {{\Delta I} \over I} \times 100

% error in

R = {2 \over {50}} \times 100 + {{0.2} \over {20}} \times 100

% error in R = 4 + 1

\therefore

% error in R = 5%

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