In a photoelectric experimental set-up ultraviolet light of wavelength 350 nm is incident on emitter plate (E). The work function of the emitter plate is `phi = 2.2` eV. AB is a uniform wire resistor having length `L = 100 cm`. Resistance of the wire AB is 10 W and the emf of the battery is `V = 10` volt. The sliding contact J can be moved along the wire AB. When the sliding contact is placed at end B of the wire resistor the micro-ammeter shows a reading of `i = 6 muA`. For answering the following questions assume that photoelectric current is very small compared to the current through the cell.
(a) Find the reading of the ammeter when the slider is moved to end A of the wire.
(b) The slider is moved gradually away from A. Plot the variation of ammeter reading versus distance of the slider measured from A.
(c) Find the maximum speed with which an electron will hit the collector plate (C) if slider J is placed at a distance of `95 cm` from A

Answer

(a) Zero
(b) `i(muA)`
`(##IJA_PHY_V02_C15_E01_049_A01##)`
(c) `0.8 eV`