Question

The pressure on a square plate is measured by measuring the force on the plate and the length of one side of the plate. The errors in the measurement of force and length are 3% and 2% respectively. The maximum error in the value of the pressure would be
A. `5%`
B. `6%`
C. `7%`
D. `8%`

Answer 1

Correct Answer - c
Pressure `=("Force")/("Area")orP=(F)/(A)=(F)/(L^(2))`
`therefore` The maximum possible percentage error will be
`((deltaP)/(P))_(max)xx100=((deltaF)/(F))xx100+2((deltaL)/(L))xx100`
`=3%+(2xx2)%=7%`