1
JEE Main 2023 (Online) 30th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
A flask contains hydrogen and oxygen in the ratio of $2: 1$ by mass at temperature $27^{\circ} \mathrm{C}$. The ratio of average kinetic energy per molecule of hydrogen and oxygen respectively is:
A
1 : 1
B
4 : 1
C
1 : 4
D
2 : 1
2
JEE Main 2023 (Online) 30th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

As shown in the figure, a current of $2 \mathrm{~A}$ flowing in an equilateral triangle of side $4 \sqrt{3} \mathrm{~cm}$. The magnetic field at the centroid $\mathrm{O}$ of the triangle is

JEE Main 2023 (Online) 30th January Evening Shift Physics - Magnetic Effect of Current Question 38 English

(Neglect the effect of earth's magnetic field)

A
$4 \sqrt{3} \times 10^{-4} \mathrm{~T}$
B
$4 \sqrt{3} \times 10^{-5} \mathrm{~T}$
C
$3 \sqrt{3} \times 10^{-5} \mathrm{~T} $
D
$\sqrt{3} \times 10^{-4} \mathrm{~T}$
3
JEE Main 2023 (Online) 30th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The output $Y$ for the inputs $A$ and $B$ of circuit is given by

JEE Main 2023 (Online) 30th January Evening Shift Physics - Semiconductor Question 32 English

Truth table of the shown circuit is:

A
JEE Main 2023 (Online) 30th January Evening Shift Physics - Semiconductor Question 32 English Option 1
B
JEE Main 2023 (Online) 30th January Evening Shift Physics - Semiconductor Question 32 English Option 2
C
JEE Main 2023 (Online) 30th January Evening Shift Physics - Semiconductor Question 32 English Option 3
D
JEE Main 2023 (Online) 30th January Evening Shift Physics - Semiconductor Question 32 English Option 4
4
JEE Main 2023 (Online) 30th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

A current carrying rectangular loop PQRS is made of uniform wire. The length $P R=Q S=5 \mathrm{~cm}$ and $P Q=R S=100 \mathrm{~cm}$. If ammeter current reading changes from I to $2 I$, the ratio of magnetic forces per unit length on the wire $P Q$ due to wire $R S$ in the two cases respectively $\left(f_{P Q}^I: f_{P Q}^{2 t}\right)$ is:

JEE Main 2023 (Online) 30th January Evening Shift Physics - Magnetic Effect of Current Question 37 English

A
1 : 4
B
1 : 3
C
1 : 2
D
1 : 5
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