Which direction do the photo-ejected electrons in a photovoltaic cell travel?
A) from the n-type, through a wire, to the p-type, and then back across the junction to the n-type silicon
B) from the p-type, through a wire, to the n-type, and then back across the junction to the p-type silicon
C) from the n-type, across the junction, into the p-type silicon
D) from the p-type, across the junction, into the n-type silicon
E) none of the above
Question 2
Which of the following statements describes what happens when you press a n-type silicon wafer against a p-type silicon wafer?
A) The n-type wafer becomes slightly positive, while the p-type becomes slightly negative.
B) The p-type wafer becomes slightly positive, while the n-type becomes slightly negative.
C) There is no change.
D) They both become slightly negative.
E) They both become slightly positive.
The three stages of cell signalling: receptor activation, signal transduction, and a cellular respon
The process of mitosis in an animal cell.
A hypothetical model of the process of cell-wall expansion.
An electron micrograph of an E. coli cell
cell line selection