In a photocell bichromatic light of wavelength 2475 Å and 6000 Å are incident on cathode whose work function is 4.8 eV. If a uniform magnetic field of 3 ´ 10?5 Tesla exists parallel to the plate, the radius of the path describe by the photoelectron will be (mass of electron = 9 ´ 10?31 kg)

• A.            1 cm                                         
• B.            5 cm
• C.            10 cm                                      
• D.            25 cm