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JEE MAIN 2025
24-01-2025 SHIFT-1
Question
Consider the following statements:
A. The junction area of solar cell is made very narrow compared to a photo diode.
B. Solar cells are not connected with any external bias.
C. LED is made of lightly doped p-n junction.
D. Increase of forward current results in continuous increase of LED light intensity.
E. LEDs have to be connected in forward bias for emission of light.
Choose the correct answer from the options given below:
Select the correct option:
A
A, C Only
B
A, C, E Only
C
B, E Only
D
B, D, E Only
✓ Correct! Well done.
✗ Incorrect. Try again or view the solution.
Solution
Conceptual
Question Tags
JEE Main
Physics
Easy
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Showing 18 questions
QJEE MAIN_2026
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QJEE MAIN_2026
Gas ' $A$ ' undergoes change from state ' $X$ ' to state ' $Y$ '. In this process, the...
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QJEE MAIN_2026
Let $e$ be the base of natural logarithm and let $f:\{1,2,3,4\} \rightarrow\left\{1, e, e^2, e^3\right\}$ and $...
JEE MainMathematicsMedium
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QJEE MAIN_2026
\text { The area of the region }\left\{(x, y): 0 \leq y \leq 6-x, y^2 \geq 4 x-3, x \geq...
JEE MainMathematicsEasy
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QJEE MAIN_2026
The value of the integral $\int_{-\frac{\pi}{4}}^{\frac{\pi}{4}}\left(\frac{32 \cos ^4 x}{1+e^{\sin x}}\right) d x$ is:
JEE MainMathematicsMedium
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QJEE MAIN 20262026
The area of the region $\left\{(x, y): 0 \leq y \leq 6-x, y^2 \geq 4 x-3, x \geq 0\right\}$ is:
JEE MainMathematicsEasy
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QJEE MAIN 20262026
Let $f:[1, \infty) \rightarrow \mathbf{R}$ be a differentiable function defined as $f(x)=\int_1^x f(\mathrm{t}) \mathrm{dt}+(1-x)\left(\log _0 x-1\right)+\mathrm{e}$. Then the value of...
JEE MainMathematicsMedium
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QJEE MAIN 20262026
The value of $\lim _{x \rightarrow 0}\left(\frac{x^2 \sin ^2 x}{x^2-\sin ^2 x}\right)$ is:
JEE MainMathematicsEasy
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QJEE MAIN_2026
Let a line L be perpendicular to both the lines $\mathrm{L}_1: \frac{x+1}{3}=\frac{y+3}{5}=\frac{z+5}{7}$ and $\mathrm{L}_2: \frac{x-2}{1}=\frac{y-4}{4}=\frac{z-6}{7}$. If $\theta$ is the acute...
JEE MainMathematicsEasy
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QJEE MAIN 20262026
Let $\left(2^{1-a}+2^{1+a}\right), f(a),\left(3^a+3^{-a}\right)$ be in A.P. and $\alpha$ be the minimum value of $f(a)$. Then the value of the integral...
JEE MainMathematicsMedium
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QJEE MAIN_2026
$\mathrm{SF}_4$ is isostructural with: A. $\mathrm{BrF}_4{ }^{!}$ B. $\mathrm{CH}_4$ C. $\mathrm{IF}_4^{\oplus}$ D. $\mathrm{XeF}_4$ E. $\mathrm{XeO}_2 \mathrm{~F}_2$ Choose the correct answer...
JEE MainPhysicsMedium
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QJEE MAIN_2026
Let the image of the point $\mathrm{P}(1,6, a)$ in the line $\mathrm{L}: \frac{x}{1}=\frac{y-1}{2}=\frac{z-a+1}{b}, b>0$, be $\left(\frac{a}{3}, 0, a+c\right)$. If $...
JEE MainMathematicsMedium
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QJEE MAIN 20262026
Let $f(x)=\lim _{y \rightarrow 0} \frac{(1-\cos (x y)) \tan (x y)}{y^3}$. Then the number of solutions of the equation $...
JEE MainMathematicsMedium
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QJEE MAIN 20262026
Let $S=\{\theta \in(-2 \pi, 2 \pi): \cos \theta+1=\sqrt{3} \sin \theta\}$. Then $\sum_{\theta \in S} \theta$ is equal to:
JEE MainMathematicsEasy
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QJEE MAIN 20262026
Let $O$ be the origin, $\overrightarrow{O P}=\vec{a}$ and $\overrightarrow{O Q}=\vec{b}$. If $R$ is the point on $\overrightarrow{O P}$ such that...
JEE MainMathematicsEasy
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QJEE MAIN_2026
The first and second ionization constants of a weak dibasic acid $\mathrm{H}_2 \mathrm{~A}$ are $8.1 \times 10^{-8}$ and $...
JEE MainPhysicsHard
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QJEE MAIN 20262026
\text { Let } 0<\alpha<1, \beta=\frac{1}{3 \alpha} \text { and } \tan ^{-1}(1-\alpha)+\tan ^{-1}(1-\beta)=\frac{\pi}{4} \text {. Then } 6(\alpha+\beta) \text { is equal to: }
JEE MainMathematicsEasy
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QJEE MAIN 20262026
If the distance of the point $(a, 2,5)$ from the image of the point $(1,2,7)$ in the line $\frac{x}{1}=\frac{y-1}{1}=\frac{z-2}{2}$ is...
JEE MainMathematicsEasy
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