1
JEE Main 2024 (Online) 4th April Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Identify the logic gate given in the circuit :

JEE Main 2024 (Online) 4th April Evening Shift Physics - Semiconductor Question 25 English

A
OR gate
B
NAND gate
C
NOR gate
D
AND gate
2
JEE Main 2024 (Online) 4th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The value of net resistance of the network as shown in the given figure is :

JEE Main 2024 (Online) 4th April Morning Shift Physics - Semiconductor Question 27 English

A
$$(30 / 11) \Omega$$
B
$$6 \Omega$$
C
$$(5 / 2) \Omega$$
D
$$(15 / 4) \Omega$$
3
JEE Main 2024 (Online) 1st February Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
To measure the temperature coefficient of resistivity $\alpha$ of a semiconductor, an electrical arrangement shown in the figure is prepared. The arm BC is made up of the semiconductor. The experiment is being conducted at $25^{\circ} \mathrm{C}$ and resistance of the semiconductor arm is $3 \mathrm{~m} \Omega$. Arm $\mathrm{BC}$ is cooled at a constant rate of $2^{\circ} \mathrm{C} / \mathrm{s}$. If the galvanometer $\mathrm{G}$ shows no deflection after $10 \mathrm{~s}$, then $\alpha$ is :

JEE Main 2024 (Online) 1st February Evening Shift Physics - Semiconductor Question 40 English
A
$-1 \times 10^{-2}{ }^{\circ} \mathrm{C}^{-1}$
B
$-2 \times 10^{-2}{ }^{\circ} \mathrm{C}^{-1}$
C
$-2.5 \times 10^{-2}{ }^{\circ} \mathrm{C}^{-1}$
D
$-1.5 \times 10^{-2}{ }^{\circ} \mathrm{C}^{-1}$
4
JEE Main 2024 (Online) 1st February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
In the given circuit if the power rating of Zener diode is $10 \mathrm{~mW}$, the value of series resistance $R_s$ to regulate the input unregulated supply is :

JEE Main 2024 (Online) 1st February Morning Shift Physics - Semiconductor Question 39 English
A
$10 \mathrm{k} \Omega$
B
$10 \Omega$
C
$1 \mathrm{k} \Omega$
D
$$ \frac{3}{7} \mathrm{k} \Omega<\mathrm{R}_{\mathrm{s}}<\frac{3}{5} \mathrm{k} \Omega$$
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