Explain the terms ‘depletion layer’ and ‘potential barrier’ in a … - Vidyadip

Question

Explain the terms ‘depletion layer’ and ‘potential barrier’ in a p-n junction diode. How are the (a) Width of depletion layer, and (b) Value of potential barrier affected when the p-n junction is forward biased?

✓

Answer

Depletion layer: It is a layer of immobile ions formed near the p-n junction by diffusion of majority charge carriers and electron-hole recombination.
Potential barrier: It is the potential difference developed across the junction when diffusion current & drift current attains equilibrium across the junction.

When forward biased, width of depletion layer decreases.
And value of barrier potential also reduces as v₀ - v.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Short Answer Type Questions [2M]" from Semiconductor Electronic: Material, Devices And Simple Circuits→Semiconductor Electronic: Material, Devices And Simple Circuits — all question types→Physics STD 12 Science question papers→Bihar Board STD 12 Science question papers→Bihar Board question paper generator→

Similar questions

Define the phenomenon of total internal reflection.

A series LCR circuit with R = 20 Ω L = 1.5 H and $C=35 \mu F$ is connected to a variable frequency 200 V ac supply. When the frequency of the supply equals the natural frequency of the circuit, what is the average power transferred to the circuit in one complete cycle?

Why is the de Broglie wavelength associated with macroscopic objects (cricket ball, car, etc.) not observed in daily life?

Explain the refraction of light from a denser medium to a rarer medium, using Huygen's principle.

Describe experiment of relative motion between magnet and coil explaining phenomenon of electromagnetic induction.

Find the dimensions of:

Linear momentum.
Frequency.
Pressure.

About 5% of the power of a 100 W light bulb is converted to visible radiation. What is the average intensity of visible radiation

at a distance of 1m from the bulb?
at a distance of 10 m?

Assume that the radiation is emitted isotropically and neglect reflection.

Write and explain Ampere's circuital law.

The speed of sound as measured by a student in the laboratory on a winter day is 340m/s when the room temperature is 17^°C. What speed will be measured by another student repeating the experiment on a day when the room temperature is 32^°C?

Explain resonance for $L-C-R$ series $A C$ circuit. Obtain the equation of resonance frequency and explain resonance curve.