Question

The pressure on a square plate is measured by measuring the force on the plate and the length of the sides of the plate by using the formula $p=\frac{F}{l^2}$. If the maximum errors in the measurement of force and length are $4 \%$ and $2 \%$ respectively, then the maximum error in the measurement of pressure is

• A. $1 \%$
• B. $2 \%$
• C. $8 \%$
• D. $10 \%$

Answer 1

Answer: (C)

Maximum percentage error in $p$
$p=4 \%+2 \times 2 \%=8 \%$