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5 Plates A and B are a part of a photoelectric cell bearing a separation...

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5 Plates A and B are a part of a photoelectric cell bearing a separation of 5 cm between each other The plates are connected through a galvanometer in absence of any cell For this combination illumination of wavelength 3000 Angstrom and 5000 Angstrom are incident on plate B carrying a work function of 2 59 eV The magnetic field B is uniformly existing in space then the minimum value of B for which the galvanometer shows zero deflection will be A 13 22 X 10 5 T B 24 22 X 105 T C 3 02 X 10 5 T D 8 3 X 105 T

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