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Calculate the Larmer angular frequency for a magnetic flux density of 12.34 x 10^-10.

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Calculate the Larmer angular frequency for a magnetic flux density of 12.34 x 10^-10.

(a) 108.36

(b) 810.63

(c) 368.81

(d) 183.36

The question was posed to me in a job interview.

I'd like to ask this question from Magnetic Dipole in portion Magnetic Forces and Materials of Electromagnetic Theory

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Correct answer is (a) 108.36

To explain: The Larmer angular frequency is the product of magnitude of the ratio of orbital dipole moment to orbital angular moment and the magnetic flux density. It is given by fL = B e/2m, where is the charge of electron and m is the mass of the electron. On substituting, we get fL = 12.34 x 10^-10 x 1.6 x 10^-19/(2 x 9.1 x 10^-31) = 108.36 units.

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