Question 1 A potential difference of 1.0 x 10- V is applied across two parallel horizontal plates that are separated by a distance of Not yet 100 mm. An oil drop of mass 3.9 x 10 " kg is held stationary by the electric field. The oil drop contains, to the nearest answered whole number. Marked out of 100 Select one: Flag O a 2391188 excess electrons question O b. 100 excess electrons O c 1 excess electron Q. d. 24 excess electrons\fQuestion 3 Use the following information to answer the next question: Not yet answered Energy Level Diagram of a Hydrogen Atom Marked out of 100 Flag question 12 Which of the following is a true statement about the spectrum produced when hydrogen electrons fall from level n = 5? Select one: O s. The shortest wavelength is produced by the transition n = $ to n = 4. O b. The lowest frequency results from the transition n = 5 to n = 1. Q.c. The shortest wavelength produced is in the ultraviolet region. O d. The longest wavelength is in the visible region.\f