The radiation corresponding to 3→2 transition of a hydrogen atom falls on a gold surface to generate photoelectrons. These electrons are passed through a magnetic field of 5 × 10–4 T. Assume that the radius of the largest circular path followed by these electrons is 7 mm, the work function of the metal is :
(Mass of electron = 9.1 × 10–31 kg)
(1) 1.36 eV
(2) 1.88 eV
(3) 0.16 eV
(4) 0.82 eV
