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QJEE MAIN 2019
A rod of length 50 cm is pivoted at one end. It is raised such that it makes an angle of $30^{\circ}$ from the horizontal...
JEE MainPhysicsHard
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QJEE MAIN 2019
The maximum number of possible oxidation states of actinoides are shown by
JEE MainChemistryEasy
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QJEE MAIN 2019
Which one of the following about an electron occupying the 1s orbital in a hydrogen atom is incorrect? (The Bohr radius is represented by a0)
JEE MainChemistryMedium
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QJEE MAIN 2019
In the experimental set up of metre bridge shown in the figure, the null point is obtained at a distance of 40 cm from A....
JEE MainPhysicsMedium
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QJEE MAIN 2019
The pitch and the number of divisions, on the circular scale, for a given screw gauge are 0.5 mm and 100 respectively. When the screw...
JEE MainPhysicsEasy
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QJEE MAIN 2019
10 mL of 1 mM surfactant solution forms a monolayer covering $0.24 \mathrm{~cm}^2$ on a polar substrate. If the polar head is approximated as a...
JEE MainChemistryEasy
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QJEE MAIN 2019
An amplitude modulated signal is plotted below: Which one of the following best describes...
JEE MainPhysicsHard
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QJEE MAIN 2019
In the circuit shown, the potential difference between A and B is:
JEE MainPhysicsMedium
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QJEE MAIN 2019
A thermometer graduated according to a linear scale reads a value $x_0$ when in contact with boiling water, and $\mathrm{x}_0 /{ }^3$ when in contact...
JEE MainPhysicsMedium
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QJEE MAIN 2019
A galvanometer having a resistance of $20 \Omega$ and 30 divisions on both sides has figure of merit 0.005 ampere/division. The resistance that should be...
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