Physics Practicals Class 12
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- Diode characteristics experiment is one of the important class 12 physics practicals that you can learn in our virtual lab.
- In this simulation, you will learn about the different types of biasing in diodes.
- You will also learn about Avalanche and Zener breakdown in the PN junction.
- You will get the knowledge of the construction of p-n junction, its working, plotting characteristics of a pn junction diode, and calculating its resistance.
- This interaction provides a very immersive environment and gives you a real-lab-like experience while conducting or performing experiments.
- All the experiment steps and procedures like arranging the experimental setup, adjusting the rheostat, noting down the readings, plotting the graphs, etc., and many more are highly interactive and have been simulated in a very similar manner as you do in a physics lab.
- This will help learners to better prepare for various competitive exams such as IIT-JEE (JEE Main & Advanced), NEET, and Olympiads.
P-N Junction Diode
A p-n junction diode is a two-terminal or two-electrode semiconductor device, which allows the electric current to flow in only one direction while blocking the electric current in the opposite or reverse direction. When the n-type semiconductor is joined with the p-type semiconductor, a p-n junction is formed. The p-n junction, which is formed when the p type and n-type semiconductors are joined, is called a p-n junction diode.
The process of applying the external voltage to a p-n junction semiconductor diode is called biasing. External voltage to the p-n junction diode is applied in any of the two methods: forward biasing or reverse biasing.
A) Forward biasing
In the forward bias condition, the negative terminal of the battery is connected to the N-type material and the positive terminal of the battery is connected to the P-Type material. This connection is also called as giving positive voltage. In this condition, the width of the depletion region decreases due to the reduction in the number of positive and negative ions.
B) Reverse biasing
In the reverse bias condition, the negative terminal of the battery is connected to the P-type material and the positive terminal of the battery is connected to the N-type material. This connection is also known as giving negative voltage. There is no current flow due to the lack of movement of electrons and holes.
V – I Characteristics:
V – I characteristics of P-N junction diodes is a curve between the voltage and current through the circuit. Voltage is taken along the X-axis, while the current is taken along the Y-axis.
Requirements for this Science Experiment
⦁ PN Junction Diode ⦁ Digital Ammeter ⦁ Digital Voltmeter ⦁ Connecting Wires ⦁ Battery Eliminator ⦁ Rheostat ⦁ Plug Key