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प्रश्न
During the formation of a p-n junction ______.
पर्याय
diffusion current keeps increasing.
drift current remains constant.
both the diffusion current and drift current remain constant.
diffusion current remains almost constant but the drift current increases till both currents become equal.
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उत्तर
During the formation of a p-n junction diffusion current remains almost constant but the drift current increases till both currents become equal.
संबंधित प्रश्न
Explain briefly with the help of necessary diagrams, the reverse biasing of a p-n junction diode. Also draw characteristic curves.
A student wants to use two p-n junction diodes to convert alternating current into direct current. Draw the labelled circuit diagram she would use and explain how it works.
In a p.n junction, the depletion region is 400 nm wide and an electric field of 5 × 105 V m−1 exists in it. (a) Find the height of the potential barrier. (b) What should be the minimum kinetic energy of a conduction electron which can diffuse from the n-side to the p-side?
The current−voltage characteristic of an ideal p-n junction diode is given by \[i = i_0 ( e^{eV/KT} - 1)\] where, the drift current i0 equals 10 µA. Take the temperature T to be 300 K. (a) Find the voltage V0 for which \[e^{eV/kT} = 100 .\]One can neglect the term 1 for voltages greater than this value. (b) Find an expression for the dynamic resistance of the diode as a function of V for V > V0. (c) Find the voltage for which the dynamic resistance is 0.2 Ω.
(Use Planck constant h = 4.14 × 10-15 eV-s, Boltzmann constant k = 8·62 × 10-5 eV/K.)
Find the currents through the resistance in the circuits shown in figure.
(Assume that the resistance of each diode is zero in forward bias and is infinity in reverse bias.)
The formation of the depletion region in a p-n junction diode is due to ______.
Diode and resistance are connected as shown in figure. Out of the following statements which one is TRUE?
What is the depletion region?
What is a p-n junction diode?
Which formula gives the dynamic resistance of a diode?
