JEE Main 2026 Physics question
Using Bohr's model, calculate the ratio of the magnetic fields generated due to the motion of the electrons in the 2ⁿᵈ and 4ᵗʰ orbits of hydrogen atom .
Answer: 32
Solution
B ∝ v/r² ∝ (1/n)/n⁴ = 1/n⁵. Ratio B(2)/B(4) = (4/2)⁵ = 32.