The capacitor having a capacitance of 10 µF is applied with a potential difference which is increased uniformly from 0 to 600 V in 2 seconds. It is then maintained constant at 600 V for 1 second and subsequently decreased uniformly to zero in five seconds.
i) Plot a graph showing the variation of current during these 8 seconds.
ii) Calculate the total charge and the energy stored in the capacitor when the terminal voltage is 600 V.
b) A capacitor consists of two similar square Aluminium plates, each 10 cm × 10 cm, mounted parallel and opposite to each other.
i) What is their capacitance in µF when the distance between them is 1 cm and the dielectric medium is air?
ii) If the capacitor is given a charge of 500 µC, what will be the potential difference between plates?
iii) How will this be affected if the space between the plates is filled with wax which has a relative permittivity of 4?