Question
How does an increase in doping concentration affect the width of depletion layer of a p-n junction diode?
✓
Answer
Since all the recombination process takes place at the junction or nearby region so depletion width is decreased with doping. In this manner, free electrons and holes reduce the ions. Reduction of positive ions means reduction of depletion region. Thus, the depletion region decreases.
Mathematically: Depletion width is nonlinearly and inversely proportional to the doping;
$\text{W}\propto1(\sqrt{\text{doping}}).$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Is current density a scalar or a vector quantity?
Experimental observations have shown that X-rays:
- Travel in vacuum with a speed of 3 × 108ms-1.
- Exhibit the phenomenon of diffraction and can be polarised.
Two particles A and B start from rest and move for equal time on a straight line. The particle A has an acceleration a for the first half of the total time and 2a for the second half. The particle B has an acceleration 2a for the first half and a for the second half. Which particle has covered larger distance?
If all the particles of a system lie in X-Y plane, is it necessary that the centre of mass be in X-Y plane?
Which device is used as a voltage regulator?
Which of the following has the minimum wavelength and which has the maximum wavelength?
Blue light, infrared rays, gamma rays, green light.
Blue light, infrared rays, gamma rays, green light.
What is the net flux of uniform elecrtric field of Exercise 1.14 through a cube of side 20 cm oriented so that its faces are parallel to the coordinate planes ?
An object is placed far away from all the objects that can exert force on it. A frame of reference is constructed by taking the origin and axes fixed in this object. Will the frame be necessarily inertial?
A variable frequency a.c source is connected to a capacitor. How will the displacement current change with decrease in frequency?
The flux inside a balloon of radius 7.0 cm is 2.0 - $10^3 NmC ^{-1}$. If the radius of the balloon is doubled, what will be the value of flux?
→