Question

Thermometer is an instrument that measures the :
A. Particles of a system
B. Temperature of a system
C. Heat of a system
D. Energy of a system

Answer 1

Hint: We have to know what is called temperature. Temperature is a physical quantity through which we can say the material is cold or hot. When the temperature of two systems are the same then we can say that both are in thermal equilibrium.

Complete answer:
We know that a thermometer is a kind of machine through which we can measure something. And the thing which we can measure by a thermometer is temperature. This is an instrument which can measure the temperature of any substances. There are many types of thermometers in the market. The most common units of temperature are kelvin, Celsius, and Fahrenheit. We can convert the temperature from one unit to another very easily.Thermometer cannot hold temperature.

Hence, option B is correct.

Note:Here to solve the question we need to know about each and every option of the question. We can get confused between temperatures of a system and the heat of a system. But both are slightly different. Heat is an energy that is transferred between two objects or two systems with different temperatures. Heat flows from high temperature to lower temperature. The units of heat are calories or joules. Heat energy is also called thermal energy. Heat transfer from high temperature to lower temperature with the help of three methods. One is convection, second one is conduction and the last one is radiation.