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JEE Main 2025 (Online) 22nd January Morning Shift
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JEE Main 2025 (Online) 22nd January Morning Shift Physics - Current Electricity Question 19 English

Sliding contact of a potentiometer is in the middle of the potentiometer wire having resistance $R_p=1 \Omega$ as shown in the figure. An external resistance of $R_e=2 \Omega$ is connected via the sliding contact. The electric current in the circuit is :

A
1.35 A
B
0.9 A
C
1.0 A
D
0.3 A
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JEE Main 2025 (Online) 22nd January Morning Shift
Numerical
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The driver sitting inside a parked car is watching vehicles approaching from behind with the help of his side view mirror, which is a convex mirror with radius of curvature $\mathrm{R}=2 \mathrm{~m}$. Another car approaches him from behind with a uniform speed of $90 \mathrm{~km} / \mathrm{hr}$. When the car is at a distance of 24 m from him, the magnitude of the acceleration of the image of the car in the side view mirror is ' $a$ '. The value of $100 a$ is __________ $\mathrm{m} / \mathrm{s}^2$.

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JEE Main 2025 (Online) 22nd January Morning Shift
Numerical
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Two soap bubbles of radius 2 cm and 4 cm , respectively, are in contact with each other. The radius of curvature of the common surface, in cm , is _________.

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JEE Main 2025 (Online) 22nd January Morning Shift
Numerical
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Three conductors of same length having thermal conductivity $k_1, k_2$ and $k_3$ are connected as shown in figure.

JEE Main 2025 (Online) 22nd January Morning Shift Physics - Heat and Thermodynamics Question 42 English

Area of cross sections of $1^{\text {st }}$ and $2^{\text {nd }}$ conductor are same and for $3^{\text {rd }}$ conductor it is double of the $1^{\text {st }}$ conductor. The temperatures are given in the figure. In steady state condition, the value of $\theta$ is _________ ${ }^{\circ} \mathrm{C}$. (Given : $\mathrm{k}_1=60 \mathrm{Js}^{-1} \mathrm{~m}^{-1} \mathrm{~K}^{-1}, \mathrm{k}_2=120 \mathrm{Js}^{-1} \mathrm{~m}^{-1} \mathrm{~K}^{-1}, \mathrm{k}_3=135 \mathrm{Js}^{-1} \mathrm{~m}^{-1} \mathrm{~K}^{-1}$ )

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