Capacitance

Question 1

What does a capacitor consist of ?

Answer 1

It consists of two parallel metal plates with an insulator material between them . Insulator material is known as dielectric medium

Question 2

What does a capacitor do ?

Answer 2

It stores energy
It smooths the circuit (makes voltage constant)
It blocks a.c current

Question 3

Capacitor stores energy but not charge ,explain

Answer 3

Both plate have same amount of charge - but type of charge opposite so net charge is 0 . Charge particles move between the plate so work is done . Energy is stored . Q~ V Q= CV

Question 4

Formulas for capacitance 1

Answer 4

Q= CV
E= 0.5 CV²
E= area under graph