Question

The least count of a screw gauge is 0.001 cm.The diameter of a wire measured by it is $0.225$ cm . Find out the percentage error in this measurement.

• A. $0.05$
• B. $0.001$
• C. $0.44$
• D. $0.11$

Answer 1

The correct option is C $0.44$

The formula for calculating percentage error is least count of a

screw gauge divided by diameter of the wire, and then

multiplied by $100.$

In this case, it would be, $0.001$ divided by

$0.225$ and the result multiplied by 100.

And based on the calculation,

the answer is $\mathrm{0.44.}$
Hence, Option $C$ is correct .