Electronics and Its Importance

What is Electronics ?

The branch of engineering which deals with current conduction through a vacuum or gas or semiconductor is known as electronics.

Electronics essentially deals with electronic devices and their utilization.

An electronic device is that in which current flows through a vacuum or gas or semiconductor.

Importance of Electronics

Electronics has gained much importance due to its numerous applications in industry.

The electronic devices are capable of performing the following functions :

  • Rectification
  • Amplification
  • Control
  • Generation

(i) Rectification :

The conversion of a.c. into d.c. is called rectification.

Electronic devices can convert a.c. power into d.c. power  with very high efficiency. This is shown in fig.1 below.

                                                                                                  Fig. 1

This d.c. supply can be used for charging storage batteries, field supply of d.c. generators, electroplating etc.

(ii) Amplification :

The process of raising the strength of a weak signal is known as amplification.

Electronic devices can accomplish the job of amplification and thus act as amplifiers as shown in fig.2 below.

Fig. 2

The amplifiers are used in a wide variety of ways. For example, an amplifier is used in a radio set where the weak signal is amplified so that it can be heard loudly. Similarly, amplifiers are used in public address system, television etc.

(iii) Control :

Electronic devices find wide applications in automatic control. For example, speed of a motor, voltage across a refrigerator etc. can be automatically controlled with the help of such devices.

(iv) Generation:

Electronic devices can convert d.c. power into a.c. power of any frequency as shown in Fig. 3 below.

Fig. 3

When performing this function, they are known as oscillators. The oscillators are used in a wide variety of ways. For example, electronic high frequency heating is used for annealing and hardening.