Question

The magnitude of zero error of the spring balance and least count of the measuring cylinder, shown here, are respectively:

• A. $2.5gand0.1mL$
• B. $5gand0.1mL$
• C. $2.5gand0.2mL$
• D. $5gand0.2mL$

Answer 1

The correct option is D

$5gand0.2mL$

In case of spring balance:-

1. Here, one main scale division is of $25g$.
2. Number of divisions on scale is $25$.
3. Thus, least count =$\frac{25g}{25}=1g$
4. The magnitude of zero error in the spring balance = $numberofdivisionwithwhichpointercoincide\times leastcount$= $5\times 1=5g$

In case of measuring cylinder:-

1. least count = $\frac{onemainscaledivison}{numberofdivision}=\frac{1}{5}=0.2mL$

Hence, option D is correct.