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In a crystalline solid, the energy band structure (E-k relation) for an electron of mass m _k(2k 3) 2m is given by E =

In a crystalline solid, the energy band structure (E-k relation) for an electron of mass m _k(2k 3) 2m is given by E = (a) m 2/3 The effective mass of the electron in the crystal is (b) m (c) EN m 2 (d) 2m

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