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1
JEE Main 2021 (Online) 27th August Morning Shift
MCQ (Single Correct Answer)
+4
-1
For a transistor in CE mode to be used as an amplifier, it must be operated in :
A
Both cut-off and Saturation
B
Saturation region only
C
Cut-off region only
D
The active region only
2
JEE Main 2021 (Online) 26th August Evening Shift
MCQ (Single Correct Answer)
+4
-1
Four NOR gates are connected as shown in figure. The truth table for the given figure is :

JEE Main 2021 (Online) 26th August Evening Shift Physics - Semiconductor Question 52 English
A
JEE Main 2021 (Online) 26th August Evening Shift Physics - Semiconductor Question 52 English Option 1
B
JEE Main 2021 (Online) 26th August Evening Shift Physics - Semiconductor Question 52 English Option 2
C
JEE Main 2021 (Online) 26th August Evening Shift Physics - Semiconductor Question 52 English Option 3
D
JEE Main 2021 (Online) 26th August Evening Shift Physics - Semiconductor Question 52 English Option 4
3
JEE Main 2021 (Online) 26th August Morning Shift
MCQ (Single Correct Answer)
+4
-1
Identify the logic operation carried out by the given circuit :-

JEE Main 2021 (Online) 26th August Morning Shift Physics - Semiconductor Question 54 English
A
OR
B
AND
C
NOR
D
NAND
4
JEE Main 2021 (Online) 26th August Morning Shift
MCQ (Single Correct Answer)
+4
-1
Statement I : By doping silicon semiconductor with pentavalent material, the electrons density increases.

Statement II : The n-type semiconductor has net negative charge.

In the light of the above statements, choose the most appropriate answer from the options given below :
A
Statement - I is true but Statement - II is false.
B
Statement - I is false but Statement - II is true.
C
Both Statement I and Statement II are true.
D
Both Statement I and Statement II are false.
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