1
MHT CET 2026 20th April Morning Shift
MCQ (Single Correct Answer)
+1
-0
In the band structure of n-type semiconductor , the free electrons donated by impurity atoms occupy energy levels in
A
the conduction band.
B
the valence band.
C
the band gap and are close to conduction band.
D
the band gap and are close to valence band.
2
MHT CET 2025 5th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

When LED is manufactured by using aluminium gallium arsenide (AlGaAs), it emits

A

ultra-violet light

B

infra red radiation

C

green light

D

blue light

3
MHT CET 2025 5th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which of the following figure represents forward bias diode?

MHT CET 2025 5th May Evening Shift Physics - Semiconductor Devices and Logic Gates Question 1 English
A

A

B

C

C

D

D

B

4
MHT CET 2025 5th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

An AND gate is followed by a NOT gate in series. With two inputs ' $A$ ' and ' $B$ ', the Boolean expression for the output ' Y ' will be

A

$\overline{\mathrm{A}+\mathrm{B}}$

B

$\overline{\mathrm{A} \cdot \mathrm{B}}$

C

$\mathrm{A} \cdot \mathrm{B}$

D

$\mathrm{A}+\mathrm{B}$

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