JEE Main 2025 Physics question

PhysicsMoving Charges and MagnetismJEE Main 2025

An electron projected perpendicular to a uniform magnetic field B moves in a circle. If Bohr's quantization is applicable, then the radius of the electronic orbit in the first excited state is

Answer: (4)

Solution

, gives . First excited state n=2, so .

Question ID VK-001774