(C) Given:Battery voltage $V = 2 \text{ V}$Diode voltage drop $V_d = 0.5 \text{ V}$Required current $I = 5 \text{ mA} = 5 \times 10^{-3} \text{ A}$Acc

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(C) Given:Battery voltage $V = 2 \text{ V}$Diode voltage drop $V_d = 0.5 \text{ V}$Required current $I = 5 \text{ mA} = 5 \times 10^{-3} \text{ A}$According to Kirchhoff's voltage law for the series circuit:$V = V_d + I \times R$$2 \text{ V} = 0.5 \text{ V} + (5 \times 10^{-3} \text{ A}) \times R$$2 - 0.5 = 5 \times 10^{-3} \times R$$1.5 = 5 \times 10^{-3} \times R$$R = \frac{1.5}{5 \times 10^{-3}}$$R = 0.3 \times 10^3 \Omega$$R = 300 \Omega$

Class 12 Physics Semiconductor Electronics PN Junction and Diode

Easy

$A$ $2 \text{ V}$ battery is connected to a diode in forward bias. $A$ voltage of $0.5 \text{ V}$ is dropped across the diode,which is independent of the current flowing through it. $A$ current greater than $10 \text{ mA}$ causes excessive heating and damages the diode. If a current of $5 \text{ mA}$ is required in the diode,what value of series resistance must be connected in the circuit?

A
$3 \text{ k}\Omega$
B
$300 \text{ k}\Omega$
C
$300 \Omega$
D
$200 \text{ k}\Omega$

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Semiconductor Electronics

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PN Junction and Diode

The figure shows two diagrams in which a diode and a resistance are connected. Out of the following statements,which one is $TRUE$?

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In the circuit shown, assume the diode to be ideal. When $V_{i}$ increases from $2 \ V$ to $6 \ V$, the change in the current is (in $mA$):

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To make a $PN$ junction conducting,

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The $\text{I-V}$ characteristic of a $\text{P-N}$ junction in forward bias is shown. The approximate forward resistance of the junction is $-$ (in $\Omega$)

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Refer to the circuit diagram given in the figure. Which of the following observations are correct?
$A.$ Total resistance of the circuit is $6 \ \Omega$.
$B.$ Current in the ammeter is $1 \ A$.
$C.$ Potential across $AB$ is $4 \ V$.
$D.$ Potential across $CD$ is $4 \ V$.
$E.$ Total resistance of the circuit is $8 \ \Omega$.
Choose the correct answer from the options given below:

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The figure shows two diagrams in which a diode and a resistance are connected. Out of the following statements,which one is $TRUE$?

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