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2021 JEE PYQ

Get chapter-wise JEE Main & Advanced questions with solutions

Q JEE-MAIN 2021
If the maximum value of accelerating potential provided by a ratio frequency oscillator is 12 kV. The number of revolution made by a proton in...
JEE Main Physics Easy
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Q JEE MAIN 2021 S2
Let be the set of all complex numbers. Let $$ \begin{aligned} & S_1=\{z \in \mathbb{C}:|z-2| \leq 1\} \text { and } \\ & S_2=\{z \in...
JEE Main Mathematics Hard
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Q JEE MAIN 2021
The material filled between the plates of a parallel plate capacitor has resistivity $200 \Omega \mathrm{~m}$. The value of capacitance of the capacitor is 2...
JEE Main Physics Easy
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Q JEE-MAIN 2021
A source of light is placed in front of a screen. Intensity of light on the screen is $I$. Two Polaroids $P_1$ and $P_2$ are...
JEE Main Physics Easy
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Q JEE MAIN 2021
If $E, L, M$ and $G$ denote the quantities as energy, angular momentum, mass and constant of gravitation respectively, then the dimensions of $P$ in...
JEE Main Physics Easy
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Q JEE MAIN 2021 S2
Let $f: R-R$ be defined as $f(x+y)+f(x-y)=2 f(x) f(y), f\left(\frac{1}{2}\right)=-1$. Then, the value of $\sum_{k=1}^{20} \frac{1}{\sin (k) \sin (k+f(k))}$ is equal to :
JEE Main Mathematics Hard
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Q JEE MAIN 2021
Two waves are simultaneously passing through a string and their equations are $y_1=A_1 \sin k(x-v t), y_2=A_2 \sin k\left(x-v t+x_0\right)$. Given amplitudes $A_1=12 m m$...
JEE Main Physics Easy
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Q JEE MAIN 2021
The initial mass of a rocket is 1000 kg . Calculate at what rate the fuel should be burnt so that the rocket is given...
JEE Main Physics Easy
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Q JEE MAIN 2021 S2
For real numbers $\alpha$ and $\beta \neq 0$, if the point of intersection of the straight lines $\frac{x-\alpha}{1}=\frac{y-1}{2}=\frac{z-1}{3}$ and $\frac{x-4}{\beta}=\frac{y-6}{3}=\frac{z-7}{3}$, lies on the plane $...
JEE Main Mathematics Medium
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Q JEE MAIN 2021
What equal length of an iron wire and a copper-nickel alloy wire, each of 2 mm diameter connected parallel to give an equivalent resistance of...
JEE Main Physics Easy
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