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QJEE MAIN 2025
A cylindrical rod of length 1 m and radius 4 cm is mounted vertically. It is subjected to a shear force of $10^5 \mathrm{~N}$ at...
JEE MainPhysicsEasy
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QJEE MAIN_2025
An electric bulb rated as 100W-220V is connected to an ac source of rms voltage 220 V. The peak value of current through the bulb...
JEE MainPhysicsEasy
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QJEE MAIN 2025
A photo-emissive substance is illuminated with a radiation of wavelength $\lambda_i$ so that it releases electrons with de-Broglie wavelength $\lambda_e$. The longest wavelength of radiation...
JEE MainPhysicsMedium
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QJEE MAIN 2025
Consider a n-type semiconductor in which $n_e$ and $n_h$ are number of electrons and holes, respectively. (A) Holes are minority carriers (B) The dopant is...
JEE MainPhysicsMedium
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QJEE MAIN 2025
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Magnetic monopoles...
JEE MainPhysicsEasy
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QJEE MAIN 2025
A wheel is rolling on a plane surface. The speed of a particle on the highest point of the rim is $8 \mathrm{~m} / \mathrm{s}$...
JEE MainPhysicsEasy
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QJEE MAIN 2025
A helicopter flying horizontally with a speed of at an altitude of 2 km , drops an object at an instant. The object hits the...
JEE MainPhysicsMedium
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QJEE MAIN 2025
For the determination of refractive index of glass slab, a travelling microscope is used whose main scale contains 300 equal divisions equals to 15 cm....
JEE MainPhysicsMedium
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QJEE MAIN 2025
The spin-only magnetic moment value of $M^{n+}$ ion formed among $\mathrm{Ni}, \mathrm{Zn}, \mathrm{Mn}$ and Cu that has the least enthalpy of atomisation is $\_\_\_\_$ ....
JEE MainChemistryEasy
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QJEE MAIN 2025
For the reaction $A \rightarrow B$ the following graph was obtained. The time required (in seconds) for the concentration of $A$ to reduce to $...
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