A variable potential difference is applied between the cathode and anode of a…
PHYSICS · Subjective · A Level · Physics · Particles and radiation · Particles and radiation
Problem
A variable potential difference is applied between the cathode and anode of a photoelectric tube. Explain why increasing the retarding (negative) potential on the collector eventually reduces the photocurrent to zero, and state what physical quantity can be obtained from the value of this "stopping" potential.