MHT CET 2021 24th September Morning Shift | Semiconductor Devices and Logic Gates Question 90 | Physics

Two identical ideal diodes are connected to an ammeter and a d.c source (1 volt) as shown. In which one of the following circuits, ammeter will not show any deflection?

MHT CET 2021 24th September Morning Shift Physics - Semiconductor Devices and Logic Gates Question 59 English

(d)

(a)

(b)

(c)

MHT CET 2021 23rd September Evening Shift

MCQ (Single Correct Answer)

-0

When the temperature of a semiconductor is increased, its resistance and electric conductivity respectively.

increases and decreases

decreases and decreases

increases and increases

decreases and increases

MHT CET 2021 23rd September Evening Shift

MCQ (Single Correct Answer)

-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

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?

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

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

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

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

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