Question

What is the symbol of wire?

Answer 1

The schematic diagram, in which different components of the circuit are represented by the symbols conveniently used, is called a circuit diagram. In the circuit diagram the different things which are shown are called components of the circuit

Complete answer:
In option (1) , we are given a SPST commonly called switch. A switch is used to turn on or off the given component in the circuit. So, this is not the wire.
In option (2) , we are shown the switch, but the switch is in ON state. This means current is flowing in the circuit, So, this is not the wire.
In option (3) , we are given an electric cell which is the driving source of the circuit. Combination of cells is called a battery. So, this is not the wire.
In option (4) , this represents a wire that conducts electrical current. So, this is the correct option.

So, the correct answer is “Option 4”.

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.