Question

an electron moving in a circular orbit of radius r makes n rotation per second. the magnetic field produced at the centre has a magnitude of

Answer 1

An electron moving in a circular orbit of radius r makes n rotation per second. the magnetic field produced at the centre has a magnitude of  B = μ0 (ne) / 2r

• we know, current in orbit,
• I = q / t
• = e / T
• = e / (2π /w)
• =we / 2 π
• =(2πn)e / 2π
• =ne
• Now,
• the magnetic field at the center of current carrying circular coil is,
• B = μ0 I / 2r
• = μ0 (ne) / 2r