Behindthesuccess

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The word electronics derives its name from electron present in all materials.

  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.Such devices have valuable properties which enable them to function and behave as the friend of man today.


Importance: Electronics has gained much importance due to its numerous application in industry. the electronic devices are capable of performing the following function:

(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 frequency.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 weak signal is known as amplification. Electronic devices can accomplish the job of amplification and thus act as amplifiers.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. 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.

(v) Conversion of Light into electricity: Electronic devices can convert light into electricity. This conversion of light into electricity is known as photo-electricity. Photo-electric devices are used in Burglar alarms,sound recording on motion pictures etc.

(vi) Conversion of electricity into light: Electronic devices can convert electricity into light. this valuable property is utilized in television and radar.