What is the electric field strength inside the hole at radial distance r < a in a plane that is perpendicular to the cylinder through the center of the hole?Hint: Can you create this charge distribution as a superposition of charge distributions for which you can use Gauss's law to find the electric field?

When a lead acid car battery is recharged by the alternator, it acts essentially as an electrolytic cell in which solid lead(ii) sulfate is reduced to lead at the cathode and oxidized to solid lead(ii) oxide at the anode. suppose a current of is fed into a car battery for seconds. calculate the mass of lead deposited on the cathode of the battery.