When V gradually increases from 0 (cathode linked to the collector), the photoelectric current is said to be increased until it reaches the saturated current. (from my book)
But from my exercise, it says it wont increase because the current is not contributed by the dry cell, but by radiation. Once the photoelectrons are emitted, they tend to go round the circuit and return to the illuminated metal. The dry cell cannot increase the number of photoelectrons.
Which one is correct?