JEE Main 2023 (Online) 1st February Evening Shift | Semiconductor Question 37 | Physics

1

JEE Main 2023 (Online) 1st February Evening Shift

MCQ (Single Correct Answer)

+4

-1

Choose the correct statement about Zener diode :

A

It works as a voltage regulator in reverse bias and behaves like simple pn junction diode in forward bias.

B

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

C

It works as a voltage regulator only in forward bias.

D

It works as a voltage regulator in forward bias and behaves like simple pn junction diode in reverse bias.

2

JEE Main 2023 (Online) 1st February Morning Shift

MCQ (Single Correct Answer)

+4

-1

Match List I with List II:

	List I		List II
A.	Intrinsic semiconductor	I.	Fermi-level near the valence bond
B.	n-type semiconductor	II.	Fermi-level in the middle of valence and conduction band.
C.	p-type semiconductor	III.	Fermi-level near the conduction band
D.	Metals	IV.	Fermi-level inside the conduction band

Choose the correct answer from the options given below :

A

A-III, B-I, C-II, D-IV

B

A-II, B-I, C-III, D-IV

C

A-I, B-II, C-III, D-IV

D

A-II, B-III, C-I, D-IV

3

JEE Main 2023 (Online) 31st January Evening Shift

MCQ (Single Correct Answer)

+4

-1

Out of Syllabus

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.

A

Statement I is correct but Statement II is incorrect

B

Both Statement I and Statement II are incorrect

C

Statement I is incorrect but Statement II is correct

D

Both Statement I and Statement II are correct

4

JEE Main 2023 (Online) 31st January Morning Shift

MCQ (Single Correct Answer)

+4

-1

The effect of increase in temperature on the number of electrons in conduction band ($$\mathrm{n_e}$$) and resistance of a semiconductor will be as:

A

$$\mathrm{n}_{\mathrm{e}}$$ decreases, resistance increases

B

Both $$\mathrm{n}_{\mathrm{e}}$$ and resistance increase

C

$$\mathrm{n}_{\mathrm{e}}$$ increases, resistance decreases

D

Both $$\mathrm{n}_{\mathrm{e}}$$ and resistance decrease