Electrical Components

Basic electrical components:-

Resistors:

Resistors resist, or limit, electric current in a circuit. The application of resistors are to limit the current, divide voltage, and, in certain cases, to generate heat.

Capacitors:

Capacitors store electrical charges; they are found in most types of electronic circuits.

Capacitor consists of an insulator (dielectric) between two conductors.

The property of capacitor is its ability to block a steady dc voltage while passing ac signals.

Inductors:

Inductors, also known as coils, are used to store energy in an electromagnetic field

When a length of wire is formed into a coil, it becomes a basic inductor. Current through coil produces an electromagnetic field.

Transformers:

Transformers are used to magnetically couple ac voltages from one point in a circuit to another, or to increase or decrease the ac voltage.

A basic transformer is an electrical device constructed of two coils placed in close proximity to each other so that there is a mutual inductance.

Electrical Instruments:-

Power supply: for providing the voltage and current.

Voltmeter: for measuring voltage.

Ammeter: for measuring current.

Ohmmeter: for measuring resistance.

Wattmeter: for measuring power.

(Voltmeter, ammeter, and ohmmeter are available in a single instruments called multimeter)

Oscilloscope: for observing and measuring ac voltages.