1
WB JEE 2022
MCQ (Single Correct Answer)
+1
-0.25

The expression $$\overline A (A + B) + (B + AA)(A + \overline B )$$ simplifies to

A
A + B
B
AB
C
$$\overline {A + B}$$
D
$$\overline A + \overline B$$
2
WB JEE 2021
MCQ (Single Correct Answer)
+1
-0.25

What is the value of current through the diode in the circuit given?
A
Zero
B
1 mA
C
19 mA
D
9 mA
3
WB JEE 2021
MCQ (Single Correct Answer)
+1
-0.25

For the given logic circuit, the output Y for inputs (A = 0, B = 1) and (A = 0, B = 0) respectively are
A
0, 0
B
0, 1
C
1, 0
D
1, 1
4
WB JEE 2020
MCQ (Single Correct Answer)
+1
-0.25
A common emitter transistor amplifier is connected with a load resistance of 6 k$$\Omega$$ . When a small AC signal of 15 mV is added to the base-emitter voltage, the alternating base current is 20$$\mu$$A and the alternating collector current is 1.8 mA. What is the voltage gain of the amplifier?
A
90
B
640
C
900
D
720
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