How does the total energy stored by the capacitor change, when the medium of air is replaced by a medium of dielectric constnat K? Explain.

How will the energy stored in a fully charged capacitor chanege when the separation between the plates is doubled and the dielectric medium of constant 4 is introduced between the plates ?

How does the sound produced by the vibrating object in a medium reach your ear ?

Deduce an expresison for the electrostatic energy stored in a capacitor of capacitance C and having charge Q. How will the energy stored and the electric field inside the capacitor be affected, when it is completely filled with a material of dielectric constant k?

A parallel plate capacitor with air between the plates has a capacitance of 8 pF. The separation between the plates is now reduced by half and the space between them is filled with a medium of dielectric constant K. Calculate the value of the capacitance of the capacitor in the second case.

How does the focal length of a glass lens change when blue light is replaced by red light. Give reasons.

How does the self inductance of an air coil change, when the number of turns in the coil is decreased?