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1
MHT CET 2023 11th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

In the case of NAND gate, if A and B are the inputs and $$\mathrm{Y}$$ is the output then

A
$$\mathrm{Y}=\mathrm{A} \cdot \mathrm{B}$$
B
$$\mathrm{Y}=\overline{\mathrm{A}-\mathrm{B}}$$
C
$$\mathrm{Y}=\overline{\mathrm{A}+\mathrm{B}}$$
D
$$\mathrm{Y}=\overline{\mathrm{A} \cdot \mathrm{B}}$$
2
MHT CET 2023 10th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A pure $$\mathrm{Si}$$ crystal has $$4 \times 10^{28}$$ atoms per $$\mathrm{m}^3$$. It is doped by 1 ppm concentration of antimony. The number of free electrons available will be

A
$$4 \times 10^{34} \mathrm{~m}^{-3}$$
B
$$4 \times 10^{28} \mathrm{~m}^{-3}$$
C
$$4 \times 10^{22} \mathrm{~m}^{-3}$$
D
$$4 \times 10^{20} \mathrm{~m}^{-3}$$
3
MHT CET 2023 10th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The output of an 'OR' gate is connected to both the inputs of a 'NAND' gate. The combination will serve as

A
OR gate
B
NOT gate
C
NOR gate
D
AND gate
4
MHT CET 2023 10th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which one of the operations of $$\mathrm{n}-\mathrm{p}-\mathrm{n}$$ transistor differs from that of $$p-n-p$$ transistor?

A
The emitter-base junction is reversed biased in $$\mathrm{n}-\mathrm{p}-\mathrm{n}$$ transistor.
B
The emitter injects minority carriers into the base region of the $$\mathrm{p}-\mathrm{n}-\mathrm{p}$$ transistor.
C
The emitter injects holes into the base of the $$\mathrm{p}-\mathrm{n}-\mathrm{p}$$ transistor and electrons into the base region of $$n-p-n$$ transistor.
D
The emitter injects holes into the base of $$\mathrm{n}-\mathrm{p}-\mathrm{n}$$ transistor.
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