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 in parallel. The diode with the lower threshold voltage will conduct first. Since $Ge$ has a thr

Vedclass · Accepted Answer

$0.4$

Vedclass · Answer

(B) In the given circuit,the $Ge$ and $Si$ diodes are in parallel. The diode with the lower threshold voltage will conduct first. Since $Ge$ has a threshold voltage of $0.3\,V$ and $Si$ has $0.7\,V$,the $Ge$ diode conducts.Case $1$: Initial connection.The voltage drop across the circuit is determined by the $Ge$ diode,$V_{drop} = 0.3\,V$.The current $i = \frac{12\,V - 0.3\,V}{5\,k\Omega} = \frac{11.7\,V}{5\,k\Omega} = 2.34\,mA$.The output voltage $V_{o1} = i 	imes R = 2.34\,mA 	imes 5\,k\Omega = 11.7\,V$.Case $2$: $Ge$ diode connection is reversed.Now,the $Ge$ diode is reverse-biased and does not conduct. The $Si$ diode is forward-biased and conducts with a threshold voltage of $0.7\,V$.The current $i = \frac{12\,V - 0.7\,V}{5\,k\Omega} = \frac{11.3\,V}{5\,k\Omega} = 2.26\,mA$.The output voltage $V_{o2} = i 	imes R = 2.26\,mA 	imes 5\,k\Omega = 11.3\,V$.The change in the value of $V_0$ is $\Delta V_0 = |V_{o1} - V_{o2}| = |11.7\,V - 11.3\,V| = 0.4\,V$.

$Ge$ 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

At $27^{\circ} C$,$500 \ mL$ of helium diffuses in $30 \ minutes$. What is the time (in hours) taken for $1000 \ mL$ of $SO_2$ to diffuse under the same experimental conditions?

$A$: The $O-O$ bond length in $H_2O_2$ is smaller than that in $O_2F_2$.
$R$: $H_2O_2$ is an ionic compound.

Heating chloroform with aqueous sodium hydroxide solution forms

Which one of the following concerns Photophosphorylation?

The maximum value of ${x^4}{e^{ - {x^2}}}$ is

Vedclass Test Series

Exam Paper Generator

Online Exam Module