Answers to Selected Problems - West Valley College

Problem Sets Physics 4D
The figure shows a typical current vs. frequency
graph for a photoelectric effect experiment. On the
figure, draw and label graphs for the following three
situations (assuming that no other parameters of
the experiment are changed):
a) The light intensity is increased.
b) The anode-cathode potential difference is
increased.
c) The cathode work function is increased.
Answer(s)
a) Current increases, f0 remains the same;
b) Maximum current increases, f0 remains the same; c) f0 increases
Melvin J. Vaughn Page 38 of 61 West Valley College