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QJEE MAIN 2025
Two charges ${q_1}$ and ${q_2}$ are separated by a distance of 30 cm. A third charge ${q_3}$ initially at 'C' as shown in the figure,...
JEE MainPhysicsMedium
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QJEE MAIN 2025
Two plane polarized light waves combine at a certain point whose electric field components are ${E_1} = {E_0}{\mathop{\rm Sin}\nolimits} \omega t$ $...
JEE MainPhysicsEasy
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QJEE MAIN 2025
An object of mass 1000 g experiences a time dependent force $\vec F = \left( {2t\hat i + 3{t^2}\hat j} \right)N$. The power generated by...
JEE MainPhysicsMedium
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QJEE MAIN 2025
A wire of resistance R is bent into a triangular pyramid as shown in figure with each segment having same length. The resistance between points...
JEE MainPhysicsMedium
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QJEE MAIN 2025
For a hydrogen atom, the ratio of the largest wavelength of Lyman series to that of the Balmer series is
JEE MainPhysicsMedium
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QJEE MAIN 2025
A rod of length 5 L is bent right angle keeping one side length as 2 L .
JEE MainPhysicsEasy
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QJEE MAIN 2025
The percentage increase in magnetic field (B) when space within a current carrying solenoid is filled with magnesium (magnetic susceptibility $...
JEE MainPhysicsHard
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QJEE MAIN 2025
A compound ' $X$ ' absorbs 2 moles of hydrogen and ' $X$ ' upon oxidation with $\mathrm{KMnO}_{4}{ }^{*} \mathrm{H}^{+}$gives The total number of $\sigma$...
JEE MainChemistryMedium
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QJEE MAIN 2025
The bond dissociation enthalpy of $\mathrm{X}_{2} \Delta \mathrm{H}_{\text {bond }}^{\circ}$ calculated from the given data is $\_\_\_\_$ $\mathrm{kJmol}{ }^{-1}$. (Nearest integer) \end{enumerate} $$ \begin{aligned} &...
JEE MainChemistryEasy
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QJEE MAIN 2025
When 81.0 g of aluminium is allowed to react with 128.0 g of oxygen gas, the mass of aluminium oxideproduced in grams is $\_\_\_\_$ (Nearest...
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