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QJEE MAIN 2019
For the given cyclic process CAB as shown for a gas, the work done is
JEE MainPhysicsEasy
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QJEE-MAIN 2019
A proton and an $\alpha$-particle (with their masses in the ratio of $1: 4$ and charges in the ratio of $1: 2$ ) are accelerated...
JEE MainPhysicsEasy
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QJEE MAIN 2019
A force acts on a 2 kg object so that its position is given as a function of time as $x=3 t^2+5$. What is the...
JEE MainPhysicsEasy
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QJEE MAIN 2019
The major product in the following conversion is
JEE MainChemistryEasy
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QJEE MAIN_2019_
A proton, an electron, and a Helium nucleus, have the same energy. They are in circular orbits in a plane due to magnetic field perpendicular...
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QJEE-MAIN 2019
There is a uniform spherically symmetric surface charge density at a distance $\mathrm{R}_0$ from the origin. The charge distribution is initially at rest and starts...
JEE MainPhysicsEasy
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QJEE MAIN 2019
The energy required to take a satellite to a height ' $h$ ' above Earth surface (radius of Earth $=6.4 \times 10^3 \mathrm{~km}$ ) is...
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QJEE-MAIN 2019
A travelling harmonic wave is represented by the equation $y(x, t)=10^{-3} \sin (50 t+2 x)$, where $x$ and $y$ are in meter and $t$ is...
JEE MainPhysicsEasy
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QJEE MAIN 2019
Two Carnot engines A and B are operated in series. The first one, A, receives heat at $T_1(=600 \mathrm{~K})$ and rejects to a reservoir at...
JEE MainPhysicsMedium
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QJEE MAIN 2019
The number of natural numbers less than 7,000 which can be formed by using the digits 0, 1, 3, 7,9 (repitition of digits allowed) is...
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