Question

In a certain region of space, electric field and magnetic field are perpendicular to

each other. An electron enters perpendicularly to both the fields and moves

undeflected. The velocity of electron is _________________.​

Answer 1

Answer:

The velocity of an electron in the first Bohr orbit of H- atom. mvr = nh/2π v = nh/2πmr. ∴ v = (1 × 6.626×10−26)/ (2 × 3.14 × 91 × 0−31 × 0.529 × 0−10) v = 2.18×106ms−1.