1
JEE Main 2023 (Online) 1st February Evening Shift
+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
+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
+4
-1

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
+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
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