A source is emitting light of wavelength of 4000 À which is directed at a photoelectric cell. Detected light has power of 1.5 mW. If 0.10 per cent of the incident photons produce photoelectrons, find current in the cell. [Given h = 6.6 × 10-34 J-s, c = 3 × 108 ms-1 and 2 = 1.6 10-19 C]
(1) 0.59 UA
(2) 1.16 MA
(3) 0.48 ĽA
(4) 0.79 UA
