Question

A) If you wanted to design a capacitor circuit that could store the greatest energy, how else would you want to maximize besides its capacitance?

B) How would using a capacitor to light a bulb compare to using just a battery?

Answer 1

a)Then energy storage capacity of a capacitor can calculate by the equation

Energy U = 0.5CV^​​2

Which means the energy storage capacity U directly proportional to its capacitance and the voltage across it.

So we need to maximize voltage across it besides it's capacitance to store maximum energy

b) even if we cannect a good capacitor lamp will operate only limed amount of time compare to battery.

To increase the time of working of lamp we need to increase the energy storage capacity.but the problem is for safe working of lamp the capacitor voltage should have maintained voltage of same as the rated voltage of the lamp.so it cannot be increase. So the possible way to increase capatance.the increasing of capacitance means increasing of size .large size of capacitor required to work a lamp for some time . it's practically difficult.