1
JEE Main 2021 (Online) 16th March Evening Shift
MCQ (Single Correct Answer)
+4
-1
The following logic gate is equivalent to :

JEE Main 2021 (Online) 16th March Evening Shift Physics - Semiconductor Question 94 English
A
NOR Gate
B
NAND Gate
C
OR Gate
D
AND Gate
2
JEE Main 2021 (Online) 26th February Evening Shift
MCQ (Single Correct Answer)
+4
-1
Draw the output signal Y in the given combination of gates.

JEE Main 2021 (Online) 26th February Evening Shift Physics - Semiconductor Question 98 English
A
JEE Main 2021 (Online) 26th February Evening Shift Physics - Semiconductor Question 98 English Option 1
B
JEE Main 2021 (Online) 26th February Evening Shift Physics - Semiconductor Question 98 English Option 2
C
JEE Main 2021 (Online) 26th February Evening Shift Physics - Semiconductor Question 98 English Option 3
D
JEE Main 2021 (Online) 26th February Evening Shift Physics - Semiconductor Question 98 English Option 4
3
JEE Main 2021 (Online) 26th February Morning Shift
MCQ (Single Correct Answer)
+4
-1
LED is constructed from Ga-As-P semiconducting material. The energy gap of this LED is 1.9 eV. Calculate the wavelength of light emitted and its colour.

[h = 6.63 $$\times$$ 10$$-$$34 Js and c = 3 $$\times$$ 108 ms$$-$$1]
A
654 nm and orange colour
B
654 nm and red colour
C
1046 nm and red colour
D
1046 nm and blue colour
4
JEE Main 2021 (Online) 25th February Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
For extrinsic semiconductors; when doping level is increased;
A
Fermi-level of both p-type and n-type semiconductors will go upward for T > TFK and downward for T < TFK, where TF is Fermi temperature.
B
Fermi-level of p-type semiconductor will go upward and Fermi-level of n-type semiconductors will go downward
C
Fermi-level of p and n-type semiconductors will not be affected.
D
Fermi-level of p-type semiconductors will go downward and Fermi-level of n-type semiconductor will go upward.
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