Terminal:

A terminal refers to the endpoint or connection point of an electrical component or circuit. It is where electrical current enters or exits a device or system. Terminals are typically metal connectors that allow for the flow of electricity.

Symbols of Main Electrical Components:

- Resistor: A resistor is a passive electrical component that restricts the flow of electric current. It is represented by the symbol "R" in circuit diagrams.

- Capacitor: A capacitor is an electronic component that stores electrical energy. It is represented by the symbol "C" in circuit diagrams.

- Inductor: An inductor is a passive electrical component that stores energy in a magnetic field. It is represented by the symbol "L" in circuit diagrams.

- Diode: A diode is a semiconductor device that allows current to flow in one direction. It is represented by the symbol "D" in circuit diagrams.

- Transistor: A transistor is a semiconductor device that amplifies or switches electronic signals and electrical power. It is represented by various symbols depending on its type, such as "NPN" or "PNP" for bipolar junction transistors.

- Switch: A switch is an electrical component that controls the flow of current in a circuit. It is represented by the symbol "S" in circuit diagrams.

- Battery: A battery is a device that converts chemical energy into electrical energy. It is represented by the symbol "B" in circuit diagrams.

Electric Current and its Effects:

- Electric Current: Electric current is the flow of electric charge through a conductor. It is measured in amperes (A) and is caused by the movement of electrons. The direction of current flow is from the positive terminal to the negative terminal.

- Effects of Electric Current: Electric current has several effects, including:

1. Heating: When an electric current passes through a conductor, it produces heat due to the resistance of the material. This effect is utilized in heating elements, electric stoves, and other appliances.

2. Magnetic Field: When a current flows through a wire, it creates a magnetic field around the wire. This principle is used in electromagnets and electric motors.

3. Chemical Effects: Electric current can cause chemical reactions. This effect is utilized in electroplating and electrolysis processes.

4. Light Production: Electric current can produce light when it passes through certain materials, such as in an incandescent light bulb or a fluorescent lamp.

5. Electrostatic Effects: Electric current can generate static charges and electrostatic effects, such as when rubbing a balloon on hair and creating static electricity.

Overall, understanding terminals, electrical component symbols, and the effects of electric current is essential in comprehending and designing electrical circuits and systems.

A terminal is the point at which a conductor from an electricalcomponent, device or network comes to an end and provides a point of connection to external circuits. ... Allelectric cells have two terminals. The first is the positive terminal and the second is the negative terminal.