In the Bohr model of hydrogen atom the electron circulates around the nucleus ina path if radius 5.1*10^-11 m at a frequency of 6.8*10^15 m/s.Find the magnetic feild set up at the centre of the orbit?

Answer the circulating electron is equivalant to a circular current carrying loop i =ef   =6.8×1015×1.6×10-19   =1.08×10-3 ampmagnetic feild at the centre B=μ0i2a=4π×10-7×1.08×10-32×0.51×10-10  =13.3 weber/metre2

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