The radius of a circular plate is measured as with an uncertainty of

PHYSICS · Single correct · A Level · Physics · Measurements and their errors · Measurements and their errors

Problem

The radius of a circular plate is measured as

r = 10.0\,\text{cm}

with an uncertainty of

\pm 2\%

. The percentage uncertainty in its area

A

is (a)

6\%

(b)

4\%

(c)

2\%

(d)

3\%