Match List I with List II. List I List II (a) Rectifier (i) Used either for stepping up or stepping down the A.C. voltage (b) Stabilizer (ii) Used to convert A.C. voltage into D.C. voltage (c) Transformer (iii) Used to remove any ripple in the rectified output voltage (d) Filter (iv) Used for constant output voltage even when the input voltage or load current change Choose the correct answer from the options given below:

a - ii , b - iv , c - i , d - iii

a - ii , b - i , c - iv , d - iii

a - ii , b - i , c - iii , d - iv

a - iii , b - iv , c - i , d - ii

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

EASY

JEE Main

IMPORTANT

Earn 100

The logic circuit shown above is equivalent to :

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Important Questions on Electronic Devices Semiconductors

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 22 - Electronic Devices Semiconductors>JEE Main - 24 Feb 2021 Shift 2>Q 53

Zener breakdown occurs in a

p - n

junction having

p

and

n

both:

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 22 - Electronic Devices Semiconductors>JEE Main - 24 Feb 2021 Shift 2>Q 54

Given below are two statements:

Statement I : $p - n$ junction diodes can be used to function as a transistor, simply by connecting two diodes, back to back, which acts as the base terminal

Statement II: In the study of transistors, the amplification factor $β$ indicates ratio of the collector current to the base current.

In the light of the above statements, choose the correct answer from the options given below.

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 22 - Electronic Devices Semiconductors>JEE Main - 24 Feb 2021 Shift 2>Q 55

A signal of

0.1 kW

is transmitted in a cable. The attenuation of cable is

- 5 dB

per

km

and cable length is

20 km .

The power received at the receiver is

10^{- x} W .

The value of

x

is _________. [Gain in

dB = 10 \log_{10} (\frac{P_{O}}{P_{i}})

]

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 22 - Electronic Devices Semiconductors>JEE Main - 25 Feb 2021 Shift 1>Q 57

A $5 V$ battery is connected across the points $X$ and $Y$ . Assume $D_{1}$ and $D_{2}$ to be normal silicon diodes. Find the current supplied by the battery if the $+ v e$ terminal of the battery is connected to point $X$ .

Question Image

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 22 - Electronic Devices Semiconductors>JEE Main - 25 Feb 2021 Shift 2>Q 58

Match List I with List II.

	List I		List II
(a)	Rectifier	(i)	Used either for stepping up or stepping down the A.C. voltage
(b)	Stabilizer	(ii)	Used to convert A.C. voltage into D.C. voltage
(c)	Transformer	(iii)	Used to remove any ripple in the rectified output voltage
(d)	Filter	(iv)	Used for constant output voltage even when the input voltage or load current change

Choose the correct answer from the options given below:

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 22 - Electronic Devices Semiconductors>JEE Main - 25 Feb 2021 Shift 2>Q 59

The truth table for the following logic circuit is :

Question Image

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 22 - Electronic Devices Semiconductors>JEE Main - 25 Feb 2021 Shift 2>Q 60

If a message signal of frequency

f_{m}

is amplitude modulated with a carrier signal of frequency

f_{c}

and radiated through an antenna, the wavelength of the corresponding signal in air is

The logic circuit shown above is equivalent to :

Important Questions on Electronic Devices Semiconductors

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