# Circuit Diagram Basics

A circuit diagram is a graphical representation of an electrical circuit. It shows the components of the circuit, and how they are connected together. Circuit diagrams are used to design, build, and troubleshoot electrical circuits.

Circuit diagrams are typically drawn using standard symbols for the different components of a circuit. These symbols are defined by the International Electrotechnical Commission (IEC).

The basic components of a circuit diagram are:

• Voltage sources (batteries, power supplies, etc.)
• Current sources (generators, motors, etc.)
• Resistors
• Capacitors
• Inductors
• Diodes
• Transistors
• Integrated circuits

Circuit diagrams can be drawn in either a schematic or a pictorial format. Schematic diagrams show the components of the circuit in their ideal form, without any regard for their physical appearance. Pictorial diagrams show the components of the circuit in their actual physical form.

Circuit diagrams are used by engineers, technicians, and hobbyists to design, build, and troubleshoot electrical circuits. They are also used by students to learn about the principles of electricity and electronics.

Here is a simple circuit diagram of a light bulb connected to a battery: This circuit diagram shows a battery (V) connected to a light bulb (L). The battery provides the voltage source for the circuit, and the light bulb is the load. The circuit is complete when the switch (S) is closed.

When the switch is closed, the current flows from the battery through the light bulb and back to the battery. This causes the light bulb to light up.

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