Question

Statement 1: Two students measure the length of a stick as $1.3\text{m}$ and $1.30\text{m}$. Both the measurements are equally accurate.
Statement 2: The zero at the end of a measurement is always meaningless.

• A. Only statement 1 is correct.
• B. Only statement 2 is correct.
• C. Both statements are correct.
• D. Both statements are incorrect.

Answer 1

The correct option is D Both statements are incorrect.

We know that accuracy depends on the number of significant figures. More the number of significant figures more is the accuracy of the measurement.
Also, if measurement is greater than $1$ and have decimal point then the terminal zeroes are significant.
Here, $1.30\text{m}$ have three significant figures and $1.3\text{m}$ have two significant figures. Thus, $1.30\text{m}$ is more accurate.
Hence, both statements are incorrect.