Physical Sciences/P1 14 NSC QUESTION 11 (Start on a new page.) An investigation was conducted to determine the effects of changes in frequency AND intensity on the current generated in a photoelectric cell when light is incident on it. The apparatus used in the investigation is shown in the simplified diagram below. Incident light PA 1 The results of the experiment are shown in the table below. EXPERIMENT A B с D E F FREQUENCY (Hz) 4,00 x 10 4,50 x 10 5,00 x 10 5,01 x 10 5,01 x 10" 6,50 x 10" INTENSITY (Cd) 10 10 10 10 20 10 CURRENT (LA) 0 0 0 20 40 30 11.1 Define the term work function. (2) 11.2 Identify an independent variable, The threshold frequency for the metal used in the photocell is 5,001 x 10" Hz. 11.3 Define the term threshold frequency. 7 (2) 11.4 Calculate the maximum speed of an emitted electron in experiment F. (5) In ornarim​