1
MHT CET 2021 24th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

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 4 English

A
(d)
B
(a)
C
(b)
D
(c)
2
MHT CET 2021 23rd September Evening Shift
MCQ (Single Correct Answer)
+1
-0

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

A
increases and decreases
B
decreases and decreases
C
increases and increases
D
decreases and increases
3
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
4
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
$$150 \mu \mathrm{A}$$
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