The schematic diagram, in which different components of the circuit are represented by the symbols conveniently used, is called a circuit diagram. What do you mean by the term components?

Hint: The circuit diagram is usually used in Physics and electronics and is a way of representing schematically the different things which are attached using wire.

Complete step by step answer:
The term component here means all the things which are attached with the help of an electrical wire. For example, if we are to find the validity of Ohm’s law and our goal is to verify whether for the given conductor the ohm’s law holds or not we made a simple circuit by using one battery, one ammeter for measurement of current which is connected ins series, the conductor which is to be tested and a digital voltmeter which is connected in parallel to the conductor to be tested. We arrange them and connect to the ends of the battery. Then if we draw the circuit diagram the components of this would be the battery, the ammeter, the voltmeter, the connecting wires and the conductor which is to be tested.

Note:
Everything attached in the circuit is a component of the circuit diagram. a circuit diagram shows the actual electrical connections. Some commonly used components in the circuit are wire, resistor, rheostat, cell, capacitor, diode etc. Also, each component can be represented by its unique symbol which helps in easily recognizing which component is present in the circuit and its related position in a complex circuit diagram. The term component also means an electronic component.