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JEE Main 2024 Physics question

PhysicsAtomsJEE Main 2024

Hydrogen atom is bombarded with electrons accelerated through a potential difference of V, which causes excitation of hydrogen atoms. If the experiment is being performed at T = 0 K, the minimum potential difference needed to observe any Balmer series lines in the emission spectra will be V, where α = .

Answer: 121

Solution

At 0 K the atoms are in the ground state. To see a Balmer line the atom must be excited at least to n = 3

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Question ID VK-016767