Displacement Current in Capacitor MCQ [Free PDF] – Objective Question Answer for Displacement Current in Capacitor Quiz

Dielectric strength is the potential gradient required to cause a breakdown in the material. The potential gradient is the ratio of voltage and thickness. Hence as thickness increases, dielectric strength decreases.

Dielectric strength is the potential gradient required to cause a breakdown in the material. The potential gradient is the ratio of voltage and thickness.

V = t × dielectric strength = 5 × 10 = 50MV.

The better material is to prevent electrical conductivity, the higher the dielectric strength. And the air is the best insulator so it has high dielectric strength.

Leakage is primarily caused due to electronic devices, such as transistors, connected to the capacitors. Transistors conduct a small amount of current even when they are turned off, hence they are responsible for leakage current.

When a capacitor is fully charged, there is no conduction of electrons from one plate of the capacitor to another, hence there is no conduction current and the conduction current is equal to zero.

There is, under normal circumstances, no flow of electrons in a dielectric since a dielectric is an insulator. Hence, there is a flow of electrons in a dielectric only at breakdown voltage.

Displacement current is the flow of electrons from the positive plate of the capacitor to the negative plate of the capacitor, not through the battery. Hence the type of current which flows without passing through the battery is displacement current.

Ideally, dielectrics are insulators and do not contain any free electrons. But no dielectric is a perfect dielectric, hence the free electrons are due to impurities present in each dielectric.