MHT CET 2021 23rd September Evening Shift | Semiconductor Devices and Logic Gates Question 47 | Physics

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

1 and 2 only

1, 2 and 3 only

1, 3 and 4 only

2 and 4 only

MHT CET 2021 23rd September Evening Shift

MCQ (Single Correct Answer)

-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?

$$200 \mu \mathrm{A}$$

$$50 \mu \mathrm{A}$$

$$100 \mu \mathrm{A}$$

$$150 \mu \mathrm{A}$$

MHT CET 2021 23th September Morning Shift

MCQ (Single Correct Answer)

-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 20 English

NOR, $$\overline{\mathrm{A}+\mathrm{B}}$$

AND, A , B

OR, A+B

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

MHT CET 2021 23th September Morning Shift

MCQ (Single Correct Answer)

-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 21 English

1 A, 2 A

2 A, 1 A

4 A, 2 A

2 A, 4 A

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