Ge and Si diodes conduct at 0.3,V and 0.7,V r | vedclass

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

Question

(B) In the given circuit,the $Ge$ and $Si$ diodes are connected in parallel. Since they are in parallel,the diode with the lower threshold voltage wil

Vedclass · Accepted Answer

$0.4$

Vedclass · Answer

(B) In the given circuit,the $Ge$ and $Si$ diodes are connected in parallel. Since they are in parallel,the diode with the lower threshold voltage will conduct first.Case $1$: Initially,both diodes are connected such that they are forward-biased. The $Ge$ diode has a threshold voltage of $0.3\,V$ and the $Si$ diode has $0.7\,V$. The circuit will be dominated by the $Ge$ diode,so the voltage drop across the parallel combination is $V_{drop} = 0.3\,V$.The output voltage $V_0$ is the voltage across the $5\,k\Omega$ resistor:$V_0 = V_{source} - V_{drop} = 12\,V - 0.3\,V = 11.7\,V$.Case $2$: If the $Ge$ diode connection is reversed,it becomes reverse-biased and does not conduct. Now,only the $Si$ diode is forward-biased.The voltage drop across the circuit is now determined by the $Si$ diode,which is $V_{drop} = 0.7\,V$.The new output voltage $V_0'$ is:$V_0' = V_{source} - V_{drop} = 12\,V - 0.7\,V = 11.3\,V$.The change in the value of $V_0$ is:$\Delta V_0 = |V_0 - V_0'| = |11.7\,V - 11.3\,V| = 0.4\,V$.

$Ge$ and $Si$ diodes conduct at $0.3\,V$ and $0.7\,V$ respectively. In the following figure,if the $Ge$ diode connection is reversed,the value of $V_0$ changes by......$V$.

Similar Questions

$A$ car starts from rest and moves with uniform acceleration $a$ on a straight road from time $t = 0$ to $t = T$. After that,a constant deceleration brings it to rest. In this process,the average speed of the car is

Which of the following sets of quantum numbers is correct for an electron in a $4f$ orbital?

The function $f: R \rightarrow R$ is defined by $f(x)=3^{-x}$. Observe the following statements about it:
$I$. $f$ is one-one
$II$. $f$ is onto
$III$. $f$ is a decreasing function
Which of these statements are true?

Select the correct option with respect to the age pyramids shown in the image.

$A$ convex lens $A$ of focal length $20 \ cm$ and a concave lens $B$ of focal length $5 \ cm$ are kept along the same axis with a distance $d$ between them. If a parallel beam of light falling on $A$ leaves $B$ as a parallel beam,then the distance $d$ in $cm$ will be

Vedclass Test Series

Exam Paper Generator

Online Exam Module