Question

Select the correct pair of the device and the physical quantity that it is used to measure.

• A. $\text{Thermometer}:\text{Length}$
• B. $\text{Electronic balance}:\text{Mass}$
• C. $\text{Metre ruler}:\text{Time}$
• D. $\text{Stopwatch}:\text{Temperature}$

Answer 1

The correct option is B $\text{Electronic balance}:\text{Mass}$

Mass is a fundamental physical quantity that measures the amount of matter present in a body. It is expressed in $\text{kilogram (kg)}$ in the SI system.

Mass is commonly measured by a beam-balance or a physical balance or modernly, by an $\text{electronic}$ balance. An electronic balance is also called a $\text{digital weighing scale}$. The following picture shows a simple electronic balance called a $\text{digital kitchen scale}$, used in kitchens to measure the mass of ingredients in a recipe:

A stopwatch is a time-measuring device. A thermometer is used to measure temperature and a metre ruler to measure length.