1
MHT CET 2021 23rd September Evening Shift
MCQ (Single Correct Answer)
+1
-0

For a two input AND gate, the four entries are shown in the truth table. Identify the correct ones out of these $$(\mathrm{A}, \mathrm{B}=$$ input, $$\mathrm{Y}=$$ output)

Entry A B Y
1 0 1 0
2 1 0 0
3 1 1 1
4 0 0 1

A
1 and 2 only
B
1, 2 and 3 only
C
1, 3 and 4 only
D
2 and 4 only
2
MHT CET 2021 23rd September Evening Shift
MCQ (Single Correct Answer)
+1
-0

In a CE transistor, a change of $$8.0 \mathrm{~mA}$$ in the emitter current produces a change of $$7.8 \mathrm{~mA}$$ in the collector current. What change in the base current is necessary to produce the same change in the collector current?

A
$$200 \mu \mathrm{A}$$
B
$$50 \mu \mathrm{A}$$
C
$$100 \mu \mathrm{A}$$
D
$$150 \mu \mathrm{A}$$
3
MHT CET 2021 23th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

The resultant gate and its Boolean expression in the given circuit is

MHT CET 2021 23th September Morning Shift Physics - Semiconductor Devices and Logic Gates Question 10 English

A
NOR, $$\overline{\mathrm{A}+\mathrm{B}}$$
B
AND, A , B
C
OR, A+B
D
NAND, $$\mathrm{\overline{A \cdot B}}$$
4
MHT CET 2021 23th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

What are the values of the currents flowing in each of the following diode circuits $$\mathrm{X}$$ and $$\mathrm{Y}$$ respectively? (Assume that the diodes are ideal)

MHT CET 2021 23th September Morning Shift Physics - Semiconductor Devices and Logic Gates Question 11 English

A
1 A, 2 A
B
2 A, 1 A
C
4 A, 2 A
D
2 A, 4 A
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