electronics class7

1. Electronics
Presented by

2. What is electronics?
Electronics is the study of flow of electrons in various materials or space subjected to
various conditions.
The main focus of electronics remains the controlled flow of electrons through a
medium.

3. Electronic Components
An electronic component is any basic discrete device or physical entity in an electronic
system used to affect or their associated fields.
Components can be classified as passive,active,or electromechanic.

4. Active components
Active components rely on a source of energy and usually can inject power into a
circuit,through this is not part of the definition.
Active components include amplifying components such as transistors,triode vacuum
tubes(valves),and tunnel diodes.

5. Diode
Diode allows current to
pass in one direction while
blocking it from passing
the opposite direction.

6. Led(Light-emitting diode)
A device that produces light.

7. Varactor diode
Variable capacitor which stores energy and controlled by voltage.

8. Zener diode
zener diode allows current to pass in the opposite direction after the
circuit reaches a certain threshold(for example,it ca conductafter voltage
reaches-5v )

9. Photodiode
A photodiode is a thye of photo detector capable of converting light into either
current or voltage,
Used in solar cells

10. Transistor
A transistor is a semiconductor device used to amplify and switch
electronic signals and electrical power

11. Battery
Provides voltage

12. Power supply
Usually a mains hook-up

13. Thank you