Choose the correct statement about Zener diode:

It works as a voltage regulator in reverse bias and behaves like simple p-n junction diode in forward bias

It works as a voltage regulator in both forward and reverse bias

It works a voltage regulator only in forward bias

It works as a voltage regulator in forward bias and behaves like simple p-n junction diode in reverse bias

Match the List I with List II List I List II A Intrinsic Semiconductor I Fermi-level near valence band B n-type semiconductor II Fermi-level at middle of valence and conduction band C p-type semiconductor III Fermi-level near conduction band D Metals IV Fermi-level inside conduction band Choose the correct answer from the options given below:

(A) → II, (B) → III, (C) → I, (D) → IV

(A) → I, (B) → II, (C) → III, (D) → IV

(A) → II, (B) → I, (C) → III, (D) → IV

(A) → III, (B) → I, (C) → II, (D) → IV

Given below are two statements: Statement I : In a typical transistor, all three regions emitter, base and collector have same doping level. Statement II : in a transistor, collector is the thickest and base is the thinnest segment. In the light of the above statements, choose the most appropriate answer from the options given below.

Statement I is incorrect but Statement II is correct

Both Statement I and Statement II are correct

Both Statement I and Statement II are incorrect

Statement I is correct but Statement II is incorrect

Given below are two statements Statement I : For transmitting a signal, size of antenna ( l ) should be comparable to wavelength of signal (at least l = λ 4 in dimension). Statement II : In amplitude modulation, amplitude of carrier wave remains constant (unchanged). In the light of the above statements, choose the most appropriate answer from the options given below

Statement I is correct but Statement II is incorrect

Both Statement I and Statement II are correct

Both Statement I and Statement II are incorrect

Statement I is incorrect but Statement II is correct

MEDIUM

JEE Main

IMPORTANT

Earn 100

In the given circuit the input voltage $V_{in}$ is shown in figure. The cut-in voltage of $p - n$ junction diode ( $D_{1}$ or $D_{2}$ ) is $0.6 V$ . Which of the following output voltage $(V_{0})$ waveform across the diode is correct?

50% studentsanswered this correctly

Important Questions on Electronic Devices Semiconductors

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 22 - Electronic Devices Semiconductors>JEE Main - 28 June 2022 Shift 2>Q 170

Amplitude modulated wave is represented by

V_{AM} = 10 [1 + 0.4 \cos (2 π \times 10^{4} t)] \cos (2 π \times 10^{7} t)

. The total bandwidth of the amplitude modulated wave is

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 22 - Electronic Devices Semiconductors>JEE Main - 28 June 2022 Shift 2>Q 171

A Zener of breakdown voltage $V_{Z} = 8 V$ and maximum Zener current, $I_{ZM} = 10 mA$ is subjected to an input voltage $V_{i} = 10 V$ with series resistance $R = 100 Ω$ . In the given circuit $R_{L}$ represents the variable load resistance. The ratio of maximum and minimum value of $R_{L}$ is _____ .

Question Image

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 22 - Electronic Devices Semiconductors>JEE Main - 29 June 2022 Shift 1>Q 172

Only

2 %

of the optical source frequency is the available channel bandwidth for an optical communicating system operating at

1000 nm

. If an audio signal requires a bandwidth of

8 kHz

, how many channels can be accommodated for transmission

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 22 - Electronic Devices Semiconductors>JEE Main - 29 June 2022 Shift 1>Q 173

A transistor is used in an amplifier circuit in common emitter mode. If the base current changes by

100 μ A

, it brings a change of

10 mA

in collector current. If the load resistance is

2 kΩ

and input resistance is

1 kΩ

, the value of power gain is

x \times 10^{4}

. The value of

x

is _____ .

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 22 - Electronic Devices Semiconductors>JEE Main - 29 June 2022 Shift 2>Q 175

A potential barrier of

0.4 V

exists across a p-n junction. An electron enters the junction from the

n

-side with a speed of

6.0 \times 10^{5} {m s}^{- 1}

. The speed with which electron enters the

p

side will be

\frac{x}{3} \times 10^{5} {m s}^{- 1}

, then the value of

x

is _____.: (Given mass of electron

= 9 \times 10^{- 31} kg

, charge on electron

= 1.6 \times 10^{- 19} C

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 22 - Electronic Devices Semiconductors>JEE Main - 25 July 2022 Shift 1>Q 176

In the circuit, the logical value of $A = 1$ or $B = 1$ when potential at $A$ or $B$ is $5 V$ and the logical value of $A = 0$ or $B = 0$ when potential at $A$ or $B$ is $0 V$ .

Question Image

The truth table of the given circuit will be :

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 22 - Electronic Devices Semiconductors>JEE Main - 25 July 2022 Shift 1>Q 177

The energy band gap of semiconducting material to produce violet (wavelength

= 4000 Å

) LED is _____

eV

. (Round off to the nearest integer).

In the given circuit the input voltage Vin is shown in figure. The cut-in voltage of p-n junction diode (D1 or D2) is 0.6 V. Which of the following output voltage V0 waveform across the diode is correct?

Important Questions on Electronic Devices Semiconductors

Learn and Prepare for any exam you want !

In the given circuit the input voltage $V_{in}$ is shown in figure. The cut-in voltage of $p - n$ junction diode ( $D_{1}$ or $D_{2}$ ) is $0.6 V$ . Which of the following output voltage $(V_{0})$ waveform across the diode is correct?