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2021 JEE PYQ

Get chapter-wise JEE Main & Advanced questions with solutions

Q JEE-MAIN 2021
Electric field of plane electromagnetic wave propagating through a non–magnetic medium is given by $E=20 \cos \left(2 \times 10^{10} t-200 x\right) V / m$ The...
JEE Main Physics Easy
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Q JEE MAIN 2021
Consider the function $$ \begin{array}{ll} f(x)=\frac{P(x)}{\sin (x-2)}, & x \neq 2 \\ =7 & x=2 \end{array} $$ Where $\mathrm{P}(\mathrm{x})$ is a polynomial such that $...
JEE Main Mathematics Medium
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Q JEE MAIN 2021
Match List-I with List-II :

Choose the most appropriate match :
JEE Main Chemistry Easy
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Q JEE MAIN 2021
Figure A and B shown two long straight wires of circular cross-section (a and b with a < b), carrying current I which is uniformly...
JEE Main Physics Easy
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Q JEE MAIN 2021
The nuclear activity of a radioactive element becomes $\left(\frac{1}{8}\right)^{\text {th }}$ of its initial value in 30 years. The half-life of radioactive elements is $\_\_\_\_$...
JEE Main Physics Easy
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Q JEE MAIN 2021
Let a be an integer such that all the real roots of the polynomial $2 x^5+5 x^4+10 x^3+10 x^2+10 x+10$ lie in the interval $...
JEE Main Mathematics Medium
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Q JEE-MAIN 2021
Four particles each of mass M, move along a circle of radius R under the action of their mutual gravitational attraction as shown in figure....
JEE Main Physics Easy
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Q JEE MAIN 2021
Let $n \in N$ and $[x]$ denote the greatest integer less than or equal to $x$. If the sum of ( $n+1$ ) terms $...
JEE Main Mathematics Medium
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Q JEE MAIN 2021
In a semiconductor, the number density of intrinsic charge carriers at $27^{\circ} \mathrm{C}$ is $1.5 \times 10^{16} / \mathrm{m}^3$. If the semiconductor is doped with...
JEE Main Physics Easy
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Q JEE MAIN 2021
Find the truth table for the function Y of A and B represented in the following figure.
JEE Main Physics Easy
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