JEE Main 2025 (Online) 28th January Evening Shift | Atoms and Nuclei Question 2 | Physics

Choose the correct nuclear process from the below options [ p : proton, n : neutron, $\mathrm{e}^{-}$: electron, $\mathrm{e}^{+}$: positron, $v:$ neutrino, $\bar{v}:$ antineutrino]

$n \rightarrow p+e^{+}+{v}$

$\mathrm{n} \rightarrow \mathrm{p}+\mathrm{e}^{-}+\bar{v}$

$\mathrm{n} \rightarrow \mathrm{p}+\mathrm{e}^{+}+\bar{v}$

$\mathrm{n} \rightarrow \mathrm{p}+\mathrm{e}^{-}+v$

JEE Main 2025 (Online) 24th January Evening Shift

MCQ (Single Correct Answer)

-1

The energy E and momentum p of a moving body of mass m are related by some equation. Given that c represents the speed of light, identify the correct equation

$\mathrm{E}^2=\mathrm{pc}^2+\mathrm{m}^2 \mathrm{c}^4$

$\mathrm{E}^2=\mathrm{pc}^2+\mathrm{m}^2 \mathrm{c}^2$

$\mathrm{E}^2=\mathrm{p}^2 \mathrm{c}^2+\mathrm{m}^2 \mathrm{c}^4$

$\mathrm{E}^2=\mathrm{p}^2 \mathrm{c}^2+\mathrm{m}^2 \mathrm{c}^2$

JEE Main 2025 (Online) 24th January Morning Shift

MCQ (Single Correct Answer)

-1

During the transition of electron from state A to state C of a Bohr atom, the wavelength of emitted radiation is $2000 \mathop A\limits^o$ and it becomes $6000 \mathop A\limits^o$ when the electron jumps from state B to state C. Then the wavelength of the radiation emitted during the transition of electrons from state A to state B is

$4000 \mathop A\limits^o$

$6000 \mathop A\limits^o$

$2000 \mathop A\limits^o$

$3000 \mathop A\limits^o$

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