In a forward biased PN-junction diode,the pot | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) In an unbiased $PN$-junction,there is a potential barrier $V_B$ across the junction,where the $P$-side is at a lower potential and the $N$-side is

Vedclass · Accepted Answer

Vedclass · Answer

(A) In an unbiased $PN$-junction,there is a potential barrier $V_B$ across the junction,where the $P$-side is at a lower potential and the $N$-side is at a higher potential. When the diode is forward biased,an external voltage $V$ is applied such that the $P$-side is connected to the positive terminal and the $N$-side is connected to the negative terminal. This external voltage opposes the built-in potential barrier,effectively reducing the barrier height from $V_B$ to $(V_B - V)$. The potential profile still shows a transition from a lower potential on the $P$-side to a higher potential on the $N$-side,but the overall height of this step is reduced compared to the unbiased case. Among the given options,the graph representing a transition from a lower potential on the $P$-side to a higher potential on the $N$-side is shown in option $A$.

In a forward biased $PN$-junction diode,the potential barrier in the depletion region is of the form...

Similar Questions

In the given figure,a diode $D$ is connected to an external resistance $R = 100 \,\Omega$ and an $e.m.f.$ of $3.5 \,V$. If the barrier potential developed across the diode is $0.5 \,V$,the current in the circuit will be ........ $mA$.

Different voltages are applied across a $P-N$ junction and the currents are measured for each value. Which of the following graphs is obtained between voltage and current?

When a $P-N$ junction is in reverse bias,the current flowing through the junction is primarily due to:

Two ideal diodes are connected to a battery as shown in the circuit. The current supplied by the battery is

If $Si$ and $Ge$ diodes have barrier potentials of $0.7 \ V$ and $0.3 \ V$ respectively,as shown in the circuit,find the values of $V_0$ and $I$. If the $Ge$ diode connection is reversed,find the new values of $V_0$ and $I$ respectively.

Vedclass Test Series

Exam Paper Generator

Online Exam Module