Question

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



(1) 2.5g and 0.1 mL
(2) 5.0g and 0.1 mL
(3) 2.5g and 0.2 mL
(4) 5.0g and 0.2 mL

Answer 1

Total number of divisions on the scale of spring balance = 100

Least count of the spring balance $=\frac{250}{100}=2.5\text{g}$

Zero mark lags behind by 2 divisions on the main scale, so the zero error = $2.5\times 2=5.0\text{g}$

Total number of divisions on the scale of measuring cylinder = 50

Least count $=\frac{10}{50}=0.2\text{mL}$

Hence, the correct answer is option 4.