1
JEE Main 2022 (Online) 27th July Evening Shift
+4
-1 For a constant collector-emitter voltage of $$8 \mathrm{~V}$$, the collector current of a transistor reached to the value of $$6 \mathrm{~mA}$$ from $$4 \mathrm{~mA}$$, whereas base current changed from $$20 \,\mu \mathrm{A}$$ to $$25 \,\mu \mathrm{A}$$ value. If transistor is in active state, small signal current gain (current amplification factor) will be :

A
240
B
400
C
0.0025
D
200
2
JEE Main 2022 (Online) 27th July Morning Shift
+4
-1 A logic gate circuit has two inputs A and B and output Y. The voltage waveforms of A, B and Y are shown below. The logic gate circuit is :

A
AND gate
B
OR gate
C
NOR gate
D
NAND gate
3
JEE Main 2022 (Online) 25th July Morning Shift
+4
-1 In the circuit, the logical value of $$A=1$$ or $$B=1$$ when potential at $$A$$ or $$B$$ is $$5 \mathrm{~V}$$ and the logical value of $$A=0$$ or $$B=0$$ when potential at $$A$$ or $$B$$ is $$0 \mathrm{~V}$$. The truth table of the given circuit will be :

A
$$\matrix{ A & B & Y \cr 0 & 0 & 0 \cr 1 & 0 & 0 \cr 0 & 1 & 0 \cr 1 & 1 & 1 \cr }$$
B
$$\matrix{ A & B & Y \cr 0 & 0 & 0 \cr 1 & 0 & 1 \cr 0 & 1 & 1 \cr 1 & 1 & 1 \cr }$$
C
$$\matrix{ A & B & Y \cr 0 & 0 & 0 \cr 1 & 0 & 0 \cr 0 & 1 & 0 \cr 1 & 1 & 0 \cr }$$
D
$$\matrix{ A & B & Y \cr 0 & 0 & 1 \cr 1 & 0 & 1 \cr 0 & 1 & 1 \cr 1 & 1 & 0 \cr }$$
4
JEE Main 2022 (Online) 28th June Evening Shift
+4
-1 In the given circuit the input voltage Vin is shown in figure. The cut-in voltage of p-n junction diode (D1 or D2) is 0.6 V. Which of the following output voltage (V0) waveform across the diode is correct? A B C D JEE Main Subjects
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