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. If the maximum error in the measurement of force and length are respectively 4% and 2%, The maximum error in the measurement of pressure isA. 1%
B. 2%C. 6%
D. 8%

Answer 1

Answer ⇒ Option (d).

Explanation ⇒

% Error in Force = 4 %

% Error in Length = 2 %

Area of the Square Plate = (length)²

∴ % Error in Length in the area= = 2 × 2

= 4 %

Pressure = Force/Area

∴ % Error in Pressure = % Error in Force + % Error in Length in area

= 4 + 4

= 8 %

Hence, Option (d). is correct.

Hope it helps. :-)

Answer 2

Answer:

Explanation:

P=F/l^2

Δf/f+2Δl/l= 4+2*2 = 4+4 =8%