PHY 301 GDB SOLUTION SPRING 2023  - VIRTUAL UNIVERSITY


“How do you distinct the phenomenon of Rectification and Amplification in semiconductor, which device is used for this & tell its use in daily life application circuits”.  

Solution:

Rectification and amplification are two different concepts in the field of semiconductors.

 

Rectification refers to the process of converting an alternating current (AC) signal into a direct current (DC) signal. This is achieved by using a device called a diode. A diode allows the flow of electric current in only one direction, blocking it in the opposite direction. When an AC signal is passed through a diode, it allows the positive half-cycle to pass through while blocking the negative half-cycle. This results in the conversion of AC to DC, making rectification possible.

Daily life applications:

1.     Power supply units: Rectifiers are used to convert the AC power from the mains into DC power for various electronic devices like smartphones, laptops, and televisions.

2.     LED lighting: Rectifiers are used to convert AC power to DC power for driving LEDs (Light Emitting Diodes), which are commonly employed in lighting systems due to their energy efficiency and long lifespan.

 

 

Amplification, on the other hand, involves the increase of the amplitude or strength of an electrical signal. This is commonly done using a device known as a transistor. Transistors function as electronic switches or amplifiers by controlling the flow of current through them. By applying a small input signal at the base terminal of a transistor, the amplified output signal is obtained at the collector terminal. Transistors are widely used for amplification purposes in various electronic circuits, such as audio amplifiers, radio communication systems, and data processing units.

 

Daily life applications:

1. Audio systems: Amplifiers are employed to boost weak audio signals from devices like microphones or musical instruments to a level suitable for speakers or headphones.

2. Radio receivers: Amplifiers are utilized to amplify weak radio frequency signals, allowing us to listen to radio stations with clarity.

 

Thank You


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