1
WB JEE 2025
MCQ (Single Correct Answer)
+1
-0.25
Change Language

Manufacturers supply a zener diode with zener voltage $\mathrm{V}_{\mathrm{z}}=5.6 \mathrm{~V}$ and maximum power dissipation $P_{\mathrm{z}, \max }=\frac{1}{4} \mathrm{~W}$. This zener diode is used in the following circuit. Calculate the minimum value of the resistance $R_s$ in the circuit so that the zener diode will not burn when the input voltage is $\mathrm{V}_{\mathrm{in}}=10 \mathrm{~V}$.

A
$98.56 \Omega$
B
$170 \cdot 52 \Omega$
C
$306 \cdot 21 \Omega$
D
$412.37 \Omega$
2
WB JEE 2025
MCQ (Single Correct Answer)
+1
-0.25
Change Language

Which logic gate is represented by the following combinations of logic gates?

A
NAND
B
AND
C
NOR
D
OR
3
WB JEE 2024
MCQ (Single Correct Answer)
+1
-0.25
Change Language

A $$2 \mathrm{~V}$$ cell is connected across the points $$\mathrm{A}$$ and $$\mathrm{B}$$ as shown in the figure. Assume that the resistance of each diode is zero in forward bias and infinity in reverse bias. The current supplied by the cell is

WB JEE 2024 Physics - Electronic Devices Question 1 English

A
0.5 A
B
0.2 A
C
0.1 A
D
0.25 A
4
WB JEE 2024
MCQ (Single Correct Answer)
+2
-0.5
Change Language

In the given network of AND and OR gates, output Q can be written as (assuming n even)

WB JEE 2024 Physics - Electronic Devices Question 2 English

A
$$\mathrm{X}_0 \mathrm{X}_1+\mathrm{X}_2 \mathrm{X}_3+\ldots \mathrm{X}_{\mathrm{n}-1} \mathrm{X}_{\mathrm{n}}$$
B
$$\mathrm{X}_0 \mathrm{X}_1 \ldots \mathrm{X}_{\mathrm{n}}+\mathrm{X}_1 \mathrm{X}_2 \ldots \mathrm{X}_{\mathrm{n}}+\mathrm{X}_2 \mathrm{X}_3 \ldots \mathrm{X}_{\mathrm{n}}+\mathrm{X}_{\mathrm{n}}$$
C
$$\mathrm{X}_0 \mathrm{X}_1 \ldots \mathrm{X}_{\mathrm{n}-1}+\mathrm{X}_{\mathrm{n}-2} \mathrm{X}_{\mathrm{n}-1}+\mathrm{X}_{\mathrm{n}}$$
D
$$\mathrm{X}_0 \mathrm{X}_1 \ldots \mathrm{X}_{\mathrm{n}-1}+\mathrm{X}_2 \mathrm{X}_3 \mathrm{X}_5 \ldots \mathrm{X}_{\mathrm{n}-1}+\mathrm{X}_{\mathrm{n}-2} \mathrm{X}_{\mathrm{n}-1}+\mathrm{X}_{\mathrm{n}}$$
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