Please write in paper to show your work(you do not have to write question). Draw diagram if necessary. Scan your work and upload it (you can take a photo with phone and upload) . Each question is worth 12 point.

N1.What is the net charge on a He⁺²ion?

N2. What is the magnitude of the electrostatic force between an electron and a proton separated by a distance of 4 micro meter?

N3. Three equal and positive charges q=3.2 X 10^-19C are located equidistant from the origin as shown in the figure below. The distance of each chare from origin O is 2.0 micro meter. What is the magnitude of the total electric potential at the origin.

N4. Three capacitors are connected as shown in the figure below. What is the equivalent capacitance? (TakeC₁= 16F,C₂=32F,andC₃= 48F.)

N5.A resistor withR= 20 is connected to a battery with emf = 12.0 V and internal resistance r = 4 . Find the current through battery and resistor? What is power dissipated in the resistance R.