Air

Steel

Glass

Water

Induction method

Single touch method

Double touch method

Divided touch method

Increases

Decreases

Becomes zero

Remains same

Increases the strength of capacitance

Prevents any current flow between plates

Protects from short circuit between the plates

Helps to hold the charge in capacitor for long period

Area of the plates

Shape of the plates

Material of the plates

Thickness of the plates