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QJEE MAIN 2025
A convex lens made of glass (refractive index $=1.5$ ) has focal length 24 cm in air. When it is totally immersed in water (refractive...
JEE MainPhysicsEasy
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QJEE MAIN 2025
The number of spectral lines emitted by atomic hydrogen that is in the $4^{\text {th }}$ energy level, is
JEE MainPhysicsEasy
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QJEE MAIN 2025
An electric dipole is placed at a distance of 2 cm from an infinite plane sheet having positive charge density $\sigma_{\mathrm{o}}$. Choose the correct option...
JEE MainPhysicsHard
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QJEE MAIN 2025
Given below are two statements. One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): With the increase in...
JEE MainPhysicsHard
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QJEE MAIN 2025
A capacitor, $\mathrm{C}_{1}=6 \mu \mathrm{~F}$ is charged to a potential difference of $\mathrm{V}_{0}=5 \mathrm{~V}$ using a 5 V battery. The battery is removed and another...
JEE MainPhysicsMedium
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QJEE MAIN 2025
The difference of temperature in a material can convert heat energy into electrical energy. To harvest the heat energy, the material should have
JEE MainPhysicsEasy
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QJEE MAIN 2025
The number of natural numbers, between 212 and 999 , such that the sum of their digits is 15 , is
$\_\_\_\_$ .
JEE MainMathematicsHard
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QJEE MAIN 2025
If $y=y(x)$ is the solution of the differential equation, $\sqrt{4-x^{2}} \frac{\mathrm{~d} y}{\mathrm{~d} x}=\left(\left(\sin ^{-1}\left(\frac{x}{2}\right)\right)^{2}-y\right) \sin ^{-1}\left(\frac{x}{2}\right),-2 \leq x \leq 2, y(2)=\frac{\pi^{2}-8}{4}$, then $y^{2}(0)$ is equal...
JEE MainMathematicsEasy
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QJEE MAIN 2025
Let $A$ and $B$ be the two points of intersection of the line $y+5=0$ and the mirror image of the parabola $y^{2}=4 x$ with respect...
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