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2019 JEE PYQ

Get chapter-wise JEE Main & Advanced questions with solutions

Q JEE MAIN 2019
A 2 mW laser operates at a wavelength of 500 nm . The number of photons that will be emitted per second is: [Given Planck's...
JEE Main Physics Easy
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Q JEE MAIN 2019
The number of function f from {1, 2, 3, ...,20} onto {1, 2, 3, ..., 20} such that f(k) is a multiple of 3, whenever...
JEE Main Mathematics Medium
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Q JEE MAIN 2019
A source of sound S is moving with a velocity of 50 m/s towards a stationary observer. The observer measures the frequency of the source...
JEE Main Physics Medium
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Q JEE MAIN 2019
A simple pendulum of length L is placed between the plates of a parallel plate capacitor having electric field E, as shown in figure. Its...
JEE Main Physics Hard
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Q JEE MAIN 2019
If 19 th term of a non-zero A.P. is zero, then its $\left(49^{\text {th }}\right.$ term) $(29$ th term $)$ is
JEE Main Mathematics Easy
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Q JEE MAIN 2019
When heat $Q$ is supplied to a diatomic gas of rigid molecules, at constant volume its temperature increases by $\Delta \mathrm{T}$. The heat required to...
JEE Main Physics Easy
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Q JEE MAIN 2019
Given $\frac{b+c}{11}=\frac{c+a}{12}=\frac{a+b}{13}$ for $\triangle A B C$ with usual natation. If $\frac{\cos A}{\alpha}=\frac{\cos B}{\beta}=\frac{\cos C}{12}$, then the ordered triplet $(\alpha$, $\beta, \gamma$ ) has a...
JEE Main Mathematics Medium
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Q JEE MAIN 2019
Water from a tap emerges vertically downwards with an initial speed of $1.0 \mathrm{~ms}^{-1}$. The crosssectional area of the tap is $10^{-4} \mathrm{~m}^2$. Assume that...
JEE Main Physics Hard
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Q JEE MAIN 2019
Let $(x+10)^{50}+(x-10)^{50} =a_0+a_1 x+a_2 x^2+\ldots+a_{50} x^{50}$, for all $x \in R$ : then $\frac{a_2}{a_0}$ is equal to :
JEE Main Mathematics Medium
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Q JEE MAIN 2019
Two lines $\frac{x-3}{1}=\frac{y+1}{3}=\frac{z-3}{4}$ and $\frac{x+5}{7}=\frac{y-2}{-6}=\frac{z-3}{4}$ intersect at the point $R$. The reflection of $R$ in the $x y$-plane has coordinates :
JEE Main Mathematics Easy
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